-1+21-40=

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Solution for -1+21-40= equation: 


Simplifying
-1 + 21 + -40 = 0

Combine like terms: -1 + 21 = 20
20 + -40 = 0

Combine like terms: 20 + -40 = -20
-20 = 0

Solving
-20 = 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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