Math

Linear Equation Calculator

Solve a x + b = c for x.

Free to use — no sign-up or login.

Linear equation plot A Cartesian plot of y equals a x plus b minus c with its x-axis crossing marked when unique.

Enter valid values to draw the figure.

a = coeff of x · b, c = constants · root = x-intercept

Plot of y = ax + (b − c); the solution is the unique x-axis crossing when it exists.

x

This free Linear Equation Calculator covers Solve a x + b = c for x.

Isolate x by subtracting b and dividing by a. Related math tools sit beside How it works, with no account required.

Using the Linear Equation Calculator

Solve a x + b = c for x. Typical inputs are a (coeff of x), b and c. How it works beside the form states the identity the Linear Equation Calculator applies.

FAQ

How do I use the Linear Equation Calculator?

Open the Linear Equation Calculator, fill a (coeff of x), b and c, and read the result. Enter a (coeff of x), b, and c for the Linear Equation Calculator; use finite values in the indicated domain. The calculator reports x: Isolate x by subtracting b and dividing by a. A zero a (coeff of x) means the equation has either no unique solution or infinitely many.

What formula does the Linear Equation Calculator use?

The Linear Equation Calculator uses the identity in How it works. In words: Enter a (coeff of x), b, and c for the Linear Equation Calculator; use finite values in the indicated domain. The calculator reports x: Isolate x by subtracting b and dividing by a. A zero a (coeff of x) means the equation has either no unique solution or infinitely many.