Move all terms containing x to the left, all other terms to the right.
Add '-240' to each side of the equation.
240 + -240 + 12x = 372 + -240
Combine like terms: 240 + -240 = 0
0 + 12x = 372 + -240
12x = 372 + -240
Combine like terms: 372 + -240 = 132
12x = 132
Divide each side by '12'.
x = 11
Simplifying
x = 11
