(-18)-(-39)=

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Solution for (-18)-(-39)= equation: 


Simplifying
(-18) + -1(-39) = 0
-18 + -1(-39) = 0

Multiply -1 * -39
-18 + 39 = 0

Combine like terms: -18 + 39 = 21
21 = 0

Solving
21 = 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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