21+(-3)=

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Solution for 21+(-3)= equation: 


Simplifying
21 + (-3) = 0
21 + -3 = 0

Combine like terms: 21 + -3 = 18
18 = 0

Solving
18 = 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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