-7-20-21+9=

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Solution for -7-20-21+9= equation: 


Simplifying
-7 + -20 + -21 + 9 = 0

Combine like terms: -7 + -20 = -27
-27 + -21 + 9 = 0

Combine like terms: -27 + -21 = -48
-48 + 9 = 0

Combine like terms: -48 + 9 = -39
-39 = 0

Solving
-39 = 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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