Equation Solver
Solve a linear equation ax + b = 0.
Formula: ax + b = 0 → x = −b / a
Worth Knowing
A linear equation ax + b = 0 has exactly one solution, x = −b/a, provided a isn't zero. The edge cases are instructive: if a is zero and b isn't, there's no solution, and if both are zero, every number works. This 'isolate the variable' procedure — the same moves applied to both sides — is the foundation that later extends to systems of equations and the quadratic formula.
How to Use
- Enter a into the first field of the Equation Solver.
- Fill in the rest: b.
- Your result appears instantly as you type — there's no submit button or page reload.
Formula
ax + b = 0 → x = −b / a