9-3n-15=30

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Solution for 9-3n-15=30 equation:


Simplifying
9 + -3n + -15 = 30

Reorder the terms:
9 + -15 + -3n = 30

Combine like terms: 9 + -15 = -6
-6 + -3n = 30

Solving
-6 + -3n = 30

Solving for variable 'n'.

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

Add '6' to each side of the equation.
-6 + 6 + -3n = 30 + 6

Combine like terms: -6 + 6 = 0
0 + -3n = 30 + 6
-3n = 30 + 6

Combine like terms: 30 + 6 = 36
-3n = 36

Divide each side by '-3'.
n = -12

Simplifying
n = -12

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