Solver

Solve it, then see why.

Type an equation, an inequality, or a system. Get the answer, the graph, and — when you're ready — the step-by-step reasoning.

Enter a linear equation or inequality

Use x as the variable. Operators: + - * /. Compare with = < > <= >=.

Solve: a·x + b c·x + d

a b c d

Enter a quadratic equation

Use x as the variable and x^2 for x squared. Must equal 0 on one side, or use a form like x^2 = 9.

Solve: a·x² + b·x + c = 0

a b c

Enter an absolute-value equation or inequality

Use bars |...| for absolute value. Inside must be linear in x. Compare with = < > <= >=.

Solve: |a·x + b| k

a b k

First equation

Second equation

Two linear equations in x and y. Both sides can hold anything linear.

Solve: a₁x + b₁y = c₁ and a₂x + b₂y = c₂

a₁ b₁ c₁ a₂ b₂ c₂

Enter an equation above and press Solve. Pick a starter from the examples if you want.