-7-2+21=

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Solution for -7-2+21= equation: 


Simplifying
-7 + -2 + 21 = 0

Combine like terms: -7 + -2 = -9
-9 + 21 = 0

Combine like terms: -9 + 21 = 12
12 = 0

Solving
12 = 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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