-31+(-30)+15-20=

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Solution for -31+(-30)+15-20= equation: 


Simplifying
-31 + (-30) + 15 + -20 = 0
-31 + -30 + 15 + -20 = 0

Combine like terms: -31 + -30 = -61
-61 + 15 + -20 = 0

Combine like terms: -61 + 15 = -46
-46 + -20 = 0

Combine like terms: -46 + -20 = -66
-66 = 0

Solving
-66 = 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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