-9a+9a=12

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Solution for -9a+9a=12 equation: 


Simplifying
-9a + 9a = 12

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

Solving
0 = 12

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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