-12-15=

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Solution for -12-15= equation: 


Simplifying
-12 + -15 = 0

Combine like terms: -12 + -15 = -27
-27 = 0

Solving
-27 = 0

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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