-6-7=-90

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Solution for -6-7=-90 equation: 


Simplifying
-6 + -7 = -90

Combine like terms: -6 + -7 = -13
-13 = -90

Solving
-13 = -90

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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