15-16=-20

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Solution for 15-16=-20 equation: 


Simplifying
15 + -16 = -20

Combine like terms: 15 + -16 = -1
-1 = -20

Solving
-1 = -20

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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