90-2*n+(n+18)=90

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Solution for 90-2*n+(n+18)=90 equation:


Simplifying
90 + -2n + (n + 18) = 90

Reorder the terms:
90 + -2n + (18 + n) = 90

Remove parenthesis around (18 + n)
90 + -2n + 18 + n = 90

Reorder the terms:
90 + 18 + -2n + n = 90

Combine like terms: 90 + 18 = 108
108 + -2n + n = 90

Combine like terms: -2n + n = -1n
108 + -1n = 90

Solving
108 + -1n = 90

Solving for variable 'n'.

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

Add '-108' to each side of the equation.
108 + -108 + -1n = 90 + -108

Combine like terms: 108 + -108 = 0
0 + -1n = 90 + -108
-1n = 90 + -108

Combine like terms: 90 + -108 = -18
-1n = -18

Divide each side by '-1'.
n = 18

Simplifying
n = 18

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