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

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


Simplifying
-1(-3 + -1n) + -3(-3 + -2n) = -9
(-3 * -1 + -1n * -1) + -3(-3 + -2n) = -9
(3 + 1n) + -3(-3 + -2n) = -9
3 + 1n + (-3 * -3 + -2n * -3) = -9
3 + 1n + (9 + 6n) = -9

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

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

Combine like terms: 1n + 6n = 7n
12 + 7n = -9

Solving
12 + 7n = -9

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 = -9 + -12

Combine like terms: 12 + -12 = 0
0 + 7n = -9 + -12
7n = -9 + -12

Combine like terms: -9 + -12 = -21
7n = -21

Divide each side by '7'.
n = -3

Simplifying
n = -3

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