-72=n+8n

Solution for -72=n+8n equation:

Simplifying
-72 = n + 8n

Combine like terms: n + 8n = 9n
-72 = 9n

Solving
-72 = 9n

Solving for variable 'n'.

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

Add '-9n' to each side of the equation.
-72 + -9n = 9n + -9n

Combine like terms: 9n + -9n = 0
-72 + -9n = 0

Add '72' to each side of the equation.
-72 + 72 + -9n = 0 + 72

Combine like terms: -72 + 72 = 0
0 + -9n = 0 + 72
-9n = 0 + 72

Combine like terms: 0 + 72 = 72
-9n = 72

Divide each side by '-9'.
n = -8

Simplifying
n = -8