Math & Scientific
Equation Solver
Equation: it rearranges the equation and isolates the variable, using the quadratic formula for degree-2 equations. Worked through below with real figures, and the calculator repeats the working on your own inputs — free, on-device, instant.
Equation Solver turns your equation to solve into the result using the standard method. The maths runs locally, so nothing you enter leaves the page.
About this calculator
It matters when you need the exact relationship checked quickly rather than worked through by hand. The governing relationship: It rearranges the equation and isolates the variable, using the quadratic formula for degree-2 equations. See it on real numbers: Solve 2x + 3 = 11: 2x = 8, so x = 4 . The calculator above applies the same steps to whatever you enter — computed locally, nothing sent anywhere.
How to use
- Type an equation in x, such as 2x + 3 = 7 or x^2 - 5x + 6 = 0.
- Press Calculate to solve it.
- Read the value or values of x that satisfy the equation.
- Press Reset to clear and enter a new equation.
Why use Equation Solver
Fast
Calculations run in your browser. No round trip to a server.
Private
Your inputs never leave your device. Nothing is uploaded.
Free
No signup, no paywall, no ads-in-results, no watermarks.
Accurate
Based on standard, well-established formulas.
Mobile-ready
Optimised for phones, tablets, and desktops alike.
Transparent
Honest disclaimers wherever browser limits or regional rules apply.
Common uses
Use it when revising for exams
Use it for homework and assignment checks
Use it for verifying answers from a textbook
Use it for quick mental-math cross-checks
Use it when comparing two different methods
Use it for science-fair and project numbers
Technical notes
Equation Solver rearranges the equation and isolates the variable, using the quadratic formula for degree-2 equations.
Inputs are taken exactly as entered, so check for typos before trusting an answer.
Because it runs locally, results appear instantly with no server round-trip.
FAQ
What kinds of equations does the Equation Solver handle?
It handles linear and quadratic equations in one variable x. A quadratic can have two real roots, one repeated root, or a complex-root message.
Can the equation have terms on both sides?
Yes. You can write something like 4x - 1 = x + 8 and the solver moves everything to one side automatically.
What if there is no solution?
If the equation reduces to a contradiction, the solver reports that there is no solution; if it is always true, it reports an identity.
Does the Equation Solver send my data to a server?
No. The Equation Solver runs entirely in your browser, so nothing you enter is uploaded, stored, or shared.
Worked example
Solve 2x + 3 = 11: 2x = 8, so x = 4.