9-(-12)=

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Solution for 9-(-12)= equation: 


Simplifying
9 + -1(-12) = 0

Multiply -1 * -12
9 + 12 = 0

Combine like terms: 9 + 12 = 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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