12-15=31

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Solution for 12-15=31 equation: 


Simplifying
12 + -15 = 31

Combine like terms: 12 + -15 = -3
-3 = 31

Solving
-3 = 31

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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