9-n-3(2n-1)=15

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Solution for 9-n-3(2n-1)=15 equation: 


Simplifying
9 + -1n + -3(2n + -1) = 15

Reorder the terms:
9 + -1n + -3(-1 + 2n) = 15
9 + -1n + (-1 * -3 + 2n * -3) = 15
9 + -1n + (3 + -6n) = 15

Reorder the terms:
9 + 3 + -1n + -6n = 15

Combine like terms: 9 + 3 = 12
12 + -1n + -6n = 15

Combine like terms: -1n + -6n = -7n
12 + -7n = 15

Solving
12 + -7n = 15

Solving for variable 'n'.

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

Add '-12' to each side of the equation.
12 + -12 + -7n = 15 + -12

Combine like terms: 12 + -12 = 0
0 + -7n = 15 + -12
-7n = 15 + -12

Combine like terms: 15 + -12 = 3
-7n = 3

Divide each side by '-7'.
n = -0.4285714286

Simplifying
n = -0.4285714286

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