Algebra

Linear Equation

Solves ax + b = c for x.

x = (c − b) / a

Variables

a
nonzero coefficient
b
constant term
c
right-side value

Example

2x+3=11 → x=4

How to use this formula

Identify the known values, keep units consistent, substitute the values into the formula, and calculate carefully. Then check whether the result is reasonable for the original problem.