(-12)-(-9)=

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Solution for (-12)-(-9)= equation: 


Simplifying
(-12) + -1(-9) = 0
-12 + -1(-9) = 0

Multiply -1 * -9
-12 + 9 = 0

Combine like terms: -12 + 9 = -3
-3 = 0

Solving
-3 = 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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