18=9-n

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Solution for 18=9-n equation:


Simplifying
18 = 9 + -1n

Solving
18 = 9 + -1n

Solving for variable 'n'.

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

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

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

Add '-18' to each side of the equation.
18 + -18 + n = 9 + -18

Combine like terms: 18 + -18 = 0
0 + n = 9 + -18
n = 9 + -18

Combine like terms: 9 + -18 = -9
n = -9

Simplifying
n = -9

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