-20-15=x

Solution for -20-15=x equation:

Simplifying
-20 + -15 = x

Combine like terms: -20 + -15 = -35
-35 = x

Solving
-35 = 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.
-35 + -1x = x + -1x

Combine like terms: x + -1x = 0
-35 + -1x = 0

Add '35' to each side of the equation.
-35 + 35 + -1x = 0 + 35

Combine like terms: -35 + 35 = 0
0 + -1x = 0 + 35
-1x = 0 + 35

Combine like terms: 0 + 35 = 35
-1x = 35

Divide each side by '-1'.
x = -35

Simplifying
x = -35