-6+6(2n+6)=90

Solution for -6+6(2n+6)=90 equation:

Simplifying
-6 + 6(2n + 6) = 90

Reorder the terms:
-6 + 6(6 + 2n) = 90
-6 + (6 * 6 + 2n * 6) = 90
-6 + (36 + 12n) = 90

Combine like terms: -6 + 36 = 30
30 + 12n = 90

Solving
30 + 12n = 90

Solving for variable 'n'.

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

Add '-30' to each side of the equation.
30 + -30 + 12n = 90 + -30

Combine like terms: 30 + -30 = 0
0 + 12n = 90 + -30
12n = 90 + -30

Combine like terms: 90 + -30 = 60
12n = 60

Divide each side by '12'.
n = 5

Simplifying
n = 5