-9n+12n+(-9)=18

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Solution for -9n+12n+(-9)=18 equation:

Simplifying
-9n + 12n + (-9) = 18
-9n + 12n + -9 = 18
Reorder the terms:
-9 + -9n + 12n = 18
Combine like terms: -9n + 12n = 3n
-9 + 3n = 18
Solving
-9 + 3n = 18
Solving for variable 'n'.
Move all terms containing n to the left, all other terms to the right.
Add '9' to each side of the equation.
-9 + 9 + 3n = 18 + 9
Combine like terms: -9 + 9 = 0
0 + 3n = 18 + 9
3n = 18 + 9
Combine like terms: 18 + 9 = 27
3n = 27
Divide each side by '3'.
n = 9
Simplifying
n = 9`