20-42=x

Solution for 20-42=x equation:

Simplifying
20 + -42 = x

Combine like terms: 20 + -42 = -22
-22 = x

Solving
-22 = 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.
-22 + -1x = x + -1x

Combine like terms: x + -1x = 0
-22 + -1x = 0

Add '22' to each side of the equation.
-22 + 22 + -1x = 0 + 22

Combine like terms: -22 + 22 = 0
0 + -1x = 0 + 22
-1x = 0 + 22

Combine like terms: 0 + 22 = 22
-1x = 22

Divide each side by '-1'.
x = -22

Simplifying
x = -22