-7-13=-2

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Solution for -7-13=-2 equation: 


Simplifying
-7 + -13 = -2

Combine like terms: -7 + -13 = -20
-20 = -2

Solving
-20 = -2

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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