-15=-3-n

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Solution for -15=-3-n equation:


Simplifying
-15 = -3 + -1n

Solving
-15 = -3 + -1n

Solving for variable 'n'.

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

Add 'n' to each side of the equation.
-15 + n = -3 + -1n + n

Combine like terms: -1n + n = 0
-15 + n = -3 + 0
-15 + n = -3

Add '15' to each side of the equation.
-15 + 15 + n = -3 + 15

Combine like terms: -15 + 15 = 0
0 + n = -3 + 15
n = -3 + 15

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

Simplifying
n = 12

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