3+(-21)=

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Solution for 3+(-21)= equation: 


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

Combine like terms: 3 + -21 = -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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