-21-18=-3

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Solution for -21-18=-3 equation: 


Simplifying
-21 + -18 = -3

Combine like terms: -21 + -18 = -39
-39 = -3

Solving
-39 = -3

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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