-42=-2n-2

Solution for -42=-2n-2 equation:

Simplifying
-42 = -2n + -2

Reorder the terms:
-42 = -2 + -2n

Solving
-42 = -2 + -2n

Solving for variable 'n'.

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

Add '2n' to each side of the equation.
-42 + 2n = -2 + -2n + 2n

Combine like terms: -2n + 2n = 0
-42 + 2n = -2 + 0
-42 + 2n = -2

Add '42' to each side of the equation.
-42 + 42 + 2n = -2 + 42

Combine like terms: -42 + 42 = 0
0 + 2n = -2 + 42
2n = -2 + 42

Combine like terms: -2 + 42 = 40
2n = 40

Divide each side by '2'.
n = 20

Simplifying
n = 20