-7+21=21

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Solution for -7+21=21 equation: 


Simplifying
-7 + 21 = 21

Combine like terms: -7 + 21 = 14
14 = 21

Solving
14 = 21

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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