(N-9)*3=12

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Solution for (N-9)*3=12 equation:


Simplifying
(N + -9) * 3 = 12

Reorder the terms:
(-9 + N) * 3 = 12

Reorder the terms for easier multiplication:
3(-9 + N) = 12
(-9 * 3 + N * 3) = 12
(-27 + 3N) = 12

Solving
-27 + 3N = 12

Solving for variable 'N'.

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

Add '27' to each side of the equation.
-27 + 27 + 3N = 12 + 27

Combine like terms: -27 + 27 = 0
0 + 3N = 12 + 27
3N = 12 + 27

Combine like terms: 12 + 27 = 39
3N = 39

Divide each side by '3'.
N = 13

Simplifying
N = 13

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