2y-2y=-9

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Solution for 2y-2y=-9 equation: 


Simplifying
2y + -2y = -9

Combine like terms: 2y + -2y = 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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