Any variable, any letter
Solve for x, y, t, θ, or any letter that appears in the equation. AskSia treats the requested letter as the unknown and the rest as constants, even when there are multiple variables in the equation.
Any letter
AI Solver by AskSia
Variable Solver: every move, named
AskSia isolates any variable in any equation step-by-step. Tell Sia which letter to solve for (x, y, t, or any other) and AskSia walks through every algebraic move with the property named, so you can apply the same method on the next problem.
Works with word problems, equations, code, and science prompts.
∫ 3x² · sin(x) dx
SubjectsCalculusAlgebraPhysicsChemistryBiologyCSStatisticsEcon
4.9 / 5 · trusted by 2M+ students · 50M+ problems solved
asksia.ai/solver
98% · Verified
Problem
Find the area enclosed between y = x² and y = 2x in the first quadrant.
1
Find the points of intersection
Set the curves equal: x² = 2x → x(x - 2) = 0, so x = 0 and x = 2.
2
Identify which curve is on top
On (0, 2), 2x > x², so y = 2x is the upper curve.
3
Set up the area integral
A = ∫₀² (2x - x²) dx
4
Integrate term-by-term
A = [ x² - x³/3 ]₀²
Final Answer
A = 4/3 sq. units
Quick Answer
What is the AskSia variable solver?
The AskSia variable solver is an AI tool that isolates any single variable in any equation. For a standard equation, you can solve 'for x'; for a multi-variable literal equation (like Ax + By = C solved for y), you can isolate any letter. AskSia walks through each step with the property or operation named explicitly. Useful for Pre-Algebra through College Algebra, including word problems where you need to set up an equation and solve for the unknown.
98%
solution accuracy
50M+
problems solved
~1.5s
avg solve time
A+
study-ready explanations
Why AskSia Solver
Variables isolated. Properties named on every step.
Most variable-isolation mistakes come from skipping the algebra justification. AskSia names every move (distributive property, additive inverse, dividing both sides), so the method becomes copy-able.
Every move named
Distributive property, additive inverse, multiplicative inverse, factoring, taking the square root: each operation is named explicitly. The named justification turns the solve into a teachable example.
Properties named
Literal equations supported
Solve for one variable in terms of others (like solving Ax + By = C for y to get y = (C minus Ax)/B). Useful in physics and chemistry where you rearrange formulas to find an unknown.
Literal equations
Extraneous solutions flagged
For radical, rational, and logarithmic equations, AskSia checks every candidate solution by substituting back into the original. Extraneous solutions (which make the original undefined) are excluded with an explanation.
Extraneous handled
Exact and decimal answers
Answers are returned in exact form (with simplified radicals, fractions, or symbolic constants) and in decimal approximation. Useful when your assignment asks for one specific form.
Exact + decimal
Substitution check at the end
After isolating the variable, AskSia substitutes the answer back into the original equation and confirms both sides match. The check appears as a final line, useful before submitting homework.
Verified
How It Works
Three taps to an isolated variable.
Step 01
Capture the equation
Snap a photo, paste, or type the equation into the built-in calculator. AskSia reads any equation form, including those with multiple variables and constants.
Input mode
Snap a Photo
Textbook, handwriting, screenshot
Paste Text
Word problem or equation
Calculator
LaTeX-ready equation editor
Step 02
Tell Sia which variable
Specify the variable to isolate (x, y, t, θ, or any letter). AskSia treats the requested variable as the unknown and the rest as constants, then walks through the isolation step-by-step.
1
Set curves equal
x² = 2x → x = 0, x = 2
2
Set up the integral
A = ∫₀² (2x - x²) dx
3
Evaluate
A = [x² - x³/3]₀² = 4/3
Step 03
See the answer and check
The variable is isolated, with each move named and the substitution check shown at the end. Ask follow-up questions or generate practice problems with similar structure.
Auto-generated diagram
Region between y = 2x and y = x² — area = 4/3
Available On
Solve anywhere
you study.
Every solve syncs across Web, iOS, and Android — start it at your desk, finish on your phone.
Web App
Full study studio
Split-panel interface with the worked solution on the left, the auto-generated diagram and AI tutor chat on the right.
Drag & drop image upload + LaTeX equation editor
Auto-generated diagrams render alongside steps
Side-panel AI tutor chat for hints and alt methods
Export to PDF, DOCX, Notion, or Google Docs
Hi! What are we studying today?
Ask about your homework, lecture, or readings...↑
Calculus
98% verified
1.4s
Step 4 of 4 · Evaluate
A = [x² - x³/3]₀² = 4/3
Mobile App
Snap & solve, anywhere
Open the camera, frame the problem, and the worked solution plus diagram appear in seconds.
One-tap snap-and-solve on iOS and Android
Pinch-to-zoom diagrams, swipe between steps
Auto-sync solves with your Web library
Offline review of saved solutions and flashcards
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AskSia
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Homework solver
Live transcribe
File summary
Snap
YouTube
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Calc
98%
1.4s
Area between y=2x & y=x²
A = 4/3 sq. units ✓
Use Cases
Every solve-for-the-variable use case.
Pre-Algebra basics
First-time solve-for-x problems with one or two algebraic moves. AskSia explains each step in plain English, useful for students just starting to manipulate equations.
Pre-Algebra
Multi-step linear equations
Equations like 3(x + 2) - 4 = 11 with distribution, combining like terms, and isolating x. AskSia names every move so the sequence becomes teachable.
Multi-step linear
Literal equations
Solve formulas for a specific variable: distance = rate × time solved for time, or Ax + By = C solved for y. AskSia treats the requested variable as unknown and rearranges algebraically.
Literal equations
Quadratic and polynomial equations
Solve quadratic and higher-degree equations for x. AskSia picks factoring, the quadratic formula, or completing the square depending on the equation's structure.
Quadratic and higher
Radical and rational equations
Equations with x under a radical or in a denominator. AskSia handles the algebra and flags extraneous solutions, which appear often in these equation types.
Radical, rational
Word problem variables
When a word problem asks 'how many...' or 'find the value of...,' AskSia identifies the unknown, sets up the equation, isolates the variable, and interprets the answer in context.
Word problems
Compare
AskSia vs. ChatGPT,
Photomath & Symbolab.
General chatbots hallucinate. Photo solvers stop at math. AskSia is built for actual coursework with verified accuracy, visual learning, and every subject.
| Feature | AskSia Solver | ChatGPT | Photo Solvers |
|---|---|---|---|
| Solution accuracy | ✓ 98% | ~70-85%, hallucinations | ~90%, math only |
| Auto-generated diagrams | ✓ Every solve | Inconsistent / broken | Graphs only, math-only |
| Step-by-step explanations | ✓ Numbered + plain English | Inconsistent depth | ✓ Math steps |
| Subject coverage | ✓ Math, Physics, Chem, Bio, CS, Econ | ✓ Wide but unverified | Math only |
| Photo input | ✓ Handwriting + diagrams + code | Photos OK, weak on handwriting | ✓ Math photos only |
| Answer verification | ✓ Self-checked before display | No verification | Math engine only |
| Tutor follow-ups | ✓ Hints, alt methods, ELI5 | ✓ General chat | Not available |
| Practice and flashcards | ✓ One-tap from any solve | Manual prompting | Not available |
| Code debugging | ✓ Python, Java, C++, SQL... | ✓ Yes | Not available |
| Free to start | ✓ Daily solves, no card | Limited model access | Steps locked behind paywall |
FAQ
Frequently asked questions.
How does AskSia isolate a variable in an equation?
AskSia uses inverse operations to undo whatever is being done to the variable, one step at a time. If the variable has something added to it, subtract that thing from both sides. If multiplied by a coefficient, divide both sides by the coefficient. If under a radical, square both sides. Each move is named explicitly (additive inverse, multiplicative inverse, squaring both sides), so the sequence transfers to your next problem. For multi-step equations, AskSia uses the standard order: distribute first, then combine like terms, then isolate the variable.
Can AskSia solve a literal equation, like Ax + By = C for y?
Yes. A literal equation is an equation with multiple letters (like Ax + By = C), and 'solving for y' means rearranging algebraically so y is isolated on one side: y = (C minus Ax)/B. AskSia treats the requested variable (y in this case) as the unknown and the other letters (A, B, C, x) as constants. The same algebraic moves apply: subtract Ax from both sides, then divide both sides by B. This is the rearrangement step used constantly in physics and chemistry when you have a formula and need to solve for a specific variable.
How does AskSia handle extraneous solutions?
For radical equations (where you square both sides) and rational equations (where you multiply by a denominator that contains the variable), the algebra can introduce solutions that don't actually satisfy the original equation. These are called extraneous solutions. AskSia substitutes every candidate solution back into the original equation, and if a candidate makes the equation undefined or false, AskSia excludes it with an explanation. This catches errors that would otherwise lose you points, especially on radical and rational equation problems.
Can AskSia solve for a variable that appears multiple times?
Yes. When the variable appears in multiple places (like 2x + 3 = 5x minus 1), AskSia first collects all the variable terms on one side by subtracting or adding the appropriate term to both sides, then combines like terms, then isolates the variable using the standard inverse-operation method. The same approach works for variables that appear on both sides of fractional or rational expressions, where AskSia might first multiply through by a common denominator to clear the fractions.
How accurate is AskSia?
AskSia is engineered for accuracy on standard high school and college coursework. Accuracy comes from subject-specialized models, a symbolic verification pass that catches arithmetic errors, and a self-check step that re-derives the answer before showing it to you.
Can I get practice problems and flashcards?
Yes. After any solve, ask Sia to generate similar practice problems at SAT, ACT, AP, IB, or college difficulty, or build a flashcard set on the underlying concept in one tap. Useful for exam prep and spaced repetition before a quiz, midterm, or final.
How much does AskSia cost?
AskSia has a free plan that includes daily solves across all subjects. AskSia Pro and Super include unlimited solves, advanced subjects, the full AI tutor companion, exports, and priority response speed. See pricing for details.
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Any variable. Isolated, explained, verified.
Join 2M+ students using AskSia to solve for any variable in any equation, with every algebraic move named and a substitution check on every solve.
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