n+7-n=9

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Solution for n+7-n=9 equation: 


Simplifying
n + 7 + -1n = 9

Reorder the terms:
7 + n + -1n = 9

Combine like terms: n + -1n = 0
7 + 0 = 9
7 = 9

Solving
7 = 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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