-15+-21=

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Solution for -15+-21= equation: 


Simplifying
-15 + -21 = 0

Combine like terms: -15 + -21 = -36
-36 = 0

Solving
-36 = 0

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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