9n+12=15n-15

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Solution for 9n+12=15n-15 equation:


Simplifying
9n + 12 = 15n + -15

Reorder the terms:
12 + 9n = 15n + -15

Reorder the terms:
12 + 9n = -15 + 15n

Solving
12 + 9n = -15 + 15n

Solving for variable 'n'.

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

Add '-15n' to each side of the equation.
12 + 9n + -15n = -15 + 15n + -15n

Combine like terms: 9n + -15n = -6n
12 + -6n = -15 + 15n + -15n

Combine like terms: 15n + -15n = 0
12 + -6n = -15 + 0
12 + -6n = -15

Add '-12' to each side of the equation.
12 + -12 + -6n = -15 + -12

Combine like terms: 12 + -12 = 0
0 + -6n = -15 + -12
-6n = -15 + -12

Combine like terms: -15 + -12 = -27
-6n = -27

Divide each side by '-6'.
n = 4.5

Simplifying
n = 4.5

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