8n+(-6n)+(-9)-12=

Solution for 8n+(-6n)+(-9)-12= equation:

Simplifying
8n + (-6n) + (-9) + -12 = 0
8n + (-6n) + -9 + -12 = 0

Reorder the terms:
-9 + -12 + 8n + (-6n) = 0

Combine like terms: -9 + -12 = -21
-21 + 8n + (-6n) = 0

Combine like terms: 8n + (-6n) = 2n
-21 + 2n = 0

Solving
-21 + 2n = 0

Solving for variable 'n'.

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

Add '21' to each side of the equation.
-21 + 21 + 2n = 0 + 21

Combine like terms: -21 + 21 = 0
0 + 2n = 0 + 21
2n = 0 + 21

Combine like terms: 0 + 21 = 21
2n = 21

Divide each side by '2'.
n = 10.5

Simplifying
n = 10.5