-3+21=-9

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Solution for -3+21=-9 equation: 


Simplifying
-3 + 21 = -9

Combine like terms: -3 + 21 = 18
18 = -9

Solving
18 = -9

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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