Linear Equation Solver
Solve a linear equation of the form ax + b = 0 for x.
Quick answer: enter your details below and click Solve Equation — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
L
500 New Tools
Enter your details below.
How to use
- Enter a, the coefficient of x.
- Enter b, the constant term.
- Click Solve Equation.
About this tool
Enter the values of a and b in ax + b = 0. The tool divides to find x = -b/a and shows the working. If a is zero there is no single solution: the equation is either always true or never true, and the tool says so plainly.
Frequently asked questions
What if a is zero?
Then x disappears: the equation is either always true or impossible, and the tool reports which.
How do I check the answer?
Put x back into ax + b; the result must be zero.