-21-(-40)=

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Solution for -21-(-40)= equation: 


Simplifying
-21 + -1(-40) = 0

Multiply -1 * -40
-21 + 40 = 0

Combine like terms: -21 + 40 = 19
19 = 0

Solving
19 = 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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