9x-9x=-20

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Solution for 9x-9x=-20 equation: 


Simplifying
9x + -9x = -20

Combine like terms: 9x + -9x = 0
0 = -20

Solving
0 = -20

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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