-21-7=

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Solution for -21-7= equation: 


Simplifying
-21 + -7 = 0

Combine like terms: -21 + -7 = -28
-28 = 0

Solving
-28 = 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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