9+-n=9

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Solution for 9+-n=9 equation: 


Simplifying
9 + -1n = 9

Add '-9' to each side of the equation.
9 + -9 + -1n = 9 + -9

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

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

Solving
-1n = 0

Solving for variable 'n'.

Move all terms containing n to the left, all other terms to the right.

Divide each side by '-1'.
n = 0

Simplifying
n = 0

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