Guides ·
How to use Equation Solver
Equation Solver. Solve for x, or 2–3 simultaneous equations. That has no real solution, so none is listed.
The short answer
To solve an equation, type it with x, such as 3(x − 2) = 2x + 5. Linear equations are solved exactly (x = 11); polynomial and other equations are solved numerically for every real root between −1000 and 1000. Systems of 2 or 3 linear equations use Gaussian elimination.
It runs in your browser. What you enter is not uploaded.
How to use it
Enter your values in the fields; defaults show a worked example.
Pick the units or options that apply to you.
Read the result, which updates instantly as you type.
Check the formula note under the result to see exactly how it was worked out.
Limits worth knowing
Can it solve x² + 1 = 0? That has no real solution, so none is listed. Use the Quadratic Equation Solver to see complex roots.
What syntax can I use? + − * / ^, brackets, implied multiplication (2x, 3(x+1)), and functions like sqrt, sin, log.