(-3)+(-12+21)=

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Solution for (-3)+(-12+21)= equation: 


Simplifying
(-3) + (-12 + 21) = 0
-3 + (-12 + 21) = 0

Combine like terms: -12 + 21 = 9
-3 + (9) = 0
-3 + 9 = 0

Combine like terms: -3 + 9 = 6
6 = 0

Solving
6 = 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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