42-27=x

Solution for 42-27=x equation:

Simplifying
42 + -27 = x

Combine like terms: 42 + -27 = 15
15 = x

Solving
15 = x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-1x' to each side of the equation.
15 + -1x = x + -1x

Combine like terms: x + -1x = 0
15 + -1x = 0

Add '-15' to each side of the equation.
15 + -15 + -1x = 0 + -15

Combine like terms: 15 + -15 = 0
0 + -1x = 0 + -15
-1x = 0 + -15

Combine like terms: 0 + -15 = -15
-1x = -15

Divide each side by '-1'.
x = 15

Simplifying
x = 15