-8(n-9)-(3+3n)=-12n

Solution for -8(n-9)-(3+3n)=-12n equation:

Simplifying
-8(n + -9) + -1(3 + 3n) = -12n

Reorder the terms:
-8(-9 + n) + -1(3 + 3n) = -12n
(-9 * -8 + n * -8) + -1(3 + 3n) = -12n
(72 + -8n) + -1(3 + 3n) = -12n
72 + -8n + (3 * -1 + 3n * -1) = -12n
72 + -8n + (-3 + -3n) = -12n

Reorder the terms:
72 + -3 + -8n + -3n = -12n

Combine like terms: 72 + -3 = 69
69 + -8n + -3n = -12n

Combine like terms: -8n + -3n = -11n
69 + -11n = -12n

Solving
69 + -11n = -12n

Solving for variable 'n'.

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

Add '12n' to each side of the equation.
69 + -11n + 12n = -12n + 12n

Combine like terms: -11n + 12n = 1n
69 + 1n = -12n + 12n

Combine like terms: -12n + 12n = 0
69 + 1n = 0

Add '-69' to each side of the equation.
69 + -69 + 1n = 0 + -69

Combine like terms: 69 + -69 = 0
0 + 1n = 0 + -69
1n = 0 + -69

Combine like terms: 0 + -69 = -69
1n = -69

Divide each side by '1'.
n = -69

Simplifying
n = -69