21-(-13)=-8

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Solution for 21-(-13)=-8 equation: 


Simplifying
21 + -1(-13) = -8

Multiply -1 * -13
21 + 13 = -8

Combine like terms: 21 + 13 = 34
34 = -8

Solving
34 = -8

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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