-42=y+-20

Solution for -42=y+-20 equation:

Simplifying
-42 = y + -20

Reorder the terms:
-42 = -20 + y

Solving
-42 = -20 + y

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '-1y' to each side of the equation.
-42 + -1y = -20 + y + -1y

Combine like terms: y + -1y = 0
-42 + -1y = -20 + 0
-42 + -1y = -20

Add '42' to each side of the equation.
-42 + 42 + -1y = -20 + 42

Combine like terms: -42 + 42 = 0
0 + -1y = -20 + 42
-1y = -20 + 42

Combine like terms: -20 + 42 = 22
-1y = 22

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

Simplifying
y = -22