3a-3a=9

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Solution for 3a-3a=9 equation: 


Simplifying
3a + -3a = 9

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

Solving
0 = 9

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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