3n+(n+9)=180

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Solution for 3n+(n+9)=180 equation:


Simplifying
3n + (n + 9) = 180

Reorder the terms:
3n + (9 + n) = 180

Remove parenthesis around (9 + n)
3n + 9 + n = 180

Reorder the terms:
9 + 3n + n = 180

Combine like terms: 3n + n = 4n
9 + 4n = 180

Solving
9 + 4n = 180

Solving for variable 'n'.

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

Add '-9' to each side of the equation.
9 + -9 + 4n = 180 + -9

Combine like terms: 9 + -9 = 0
0 + 4n = 180 + -9
4n = 180 + -9

Combine like terms: 180 + -9 = 171
4n = 171

Divide each side by '4'.
n = 42.75

Simplifying
n = 42.75

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