-90-47=x

Solution for -90-47=x equation:

Simplifying
-90 + -47 = x

Combine like terms: -90 + -47 = -137
-137 = x

Solving
-137 = 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.
-137 + -1x = x + -1x

Combine like terms: x + -1x = 0
-137 + -1x = 0

Add '137' to each side of the equation.
-137 + 137 + -1x = 0 + 137

Combine like terms: -137 + 137 = 0
0 + -1x = 0 + 137
-1x = 0 + 137

Combine like terms: 0 + 137 = 137
-1x = 137

Divide each side by '-1'.
x = -137

Simplifying
x = -137