2n+(n+18)=90

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


Simplifying
2n + (n + 18) = 90

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

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

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

Combine like terms: 2n + n = 3n
18 + 3n = 90

Solving
18 + 3n = 90

Solving for variable 'n'.

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

Add '-18' to each side of the equation.
18 + -18 + 3n = 90 + -18

Combine like terms: 18 + -18 = 0
0 + 3n = 90 + -18
3n = 90 + -18

Combine like terms: 90 + -18 = 72
3n = 72

Divide each side by '3'.
n = 24

Simplifying
n = 24

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