9-9n=-9n

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Solution for 9-9n=-9n equation: 


Simplifying
9 + -9n = -9n

Add '9n' to each side of the equation.
9 + -9n + 9n = -9n + 9n

Combine like terms: -9n + 9n = 0
9 + 0 = -9n + 9n
9 = -9n + 9n

Combine like terms: -9n + 9n = 0
9 = 0

Solving
9 = 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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