-1=7+8

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Solution for -1=7+8 equation: 


Simplifying
-1 = 7 + 8

Combine like terms: 7 + 8 = 15
-1 = 15

Solving
-1 = 15

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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