3=n-12

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Solution for 3=n-12 equation:


Simplifying
3 = n + -12

Reorder the terms:
3 = -12 + n

Solving
3 = -12 + n

Solving for variable 'n'.

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

Add '-1n' to each side of the equation.
3 + -1n = -12 + n + -1n

Combine like terms: n + -1n = 0
3 + -1n = -12 + 0
3 + -1n = -12

Add '-3' to each side of the equation.
3 + -3 + -1n = -12 + -3

Combine like terms: 3 + -3 = 0
0 + -1n = -12 + -3
-1n = -12 + -3

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

Divide each side by '-1'.
n = 15

Simplifying
n = 15

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