Equation Solver
Solve a simple linear equation of the form ax + b = 0 for x.
Calculate
Enter your values below.
Result
x =
0
Formula used
ax + b = 0 → x = −b ÷ a
Example: 5x − 15 = 0 → x = 3.
How to use this calculator
- Enter a, b.
- Press Calculate to see your result instantly.
FAQ
Frequently asked questions
How is this different from the Linear Equation Calculator?
This solves the equation set equal to zero directly; the Linear Equation Calculator handles the more general ax + b = c form.
Why can't a be zero?
Without a, there's no x term left to solve for.
Can b be zero?
Yes — then the solution is simply x = 0.
Is this suitable for quadratic equations?
No, use the Quadratic Equation Calculator for equations with an x² term.