-21-69=x

Solution for -21-69=x equation:

Simplifying
-21 + -69 = x

Combine like terms: -21 + -69 = -90
-90 = x

Solving
-90 = 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.
-90 + -1x = x + -1x

Combine like terms: x + -1x = 0
-90 + -1x = 0

Add '90' to each side of the equation.
-90 + 90 + -1x = 0 + 90

Combine like terms: -90 + 90 = 0
0 + -1x = 0 + 90
-1x = 0 + 90

Combine like terms: 0 + 90 = 90
-1x = 90

Divide each side by '-1'.
x = -90

Simplifying
x = -90