(-20)(-20)+20=x

Solution for (-20)(-20)+20=x equation:

Simplifying
(-20)(-20) + 20 = x

Multiply -20 * -20
400 + 20 = x

Combine like terms: 400 + 20 = 420
420 = x

Solving
420 = 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.
420 + -1x = x + -1x

Combine like terms: x + -1x = 0
420 + -1x = 0

Add '-420' to each side of the equation.
420 + -420 + -1x = 0 + -420

Combine like terms: 420 + -420 = 0
0 + -1x = 0 + -420
-1x = 0 + -420

Combine like terms: 0 + -420 = -420
-1x = -420

Divide each side by '-1'.
x = 420

Simplifying
x = 420