9n+(7n+42)=80

Solution for 9n+(7n+42)=80 equation:

Simplifying
9n + (7n + 42) = 80

Reorder the terms:
9n + (42 + 7n) = 80

Remove parenthesis around (42 + 7n)
9n + 42 + 7n = 80

Reorder the terms:
42 + 9n + 7n = 80

Combine like terms: 9n + 7n = 16n
42 + 16n = 80

Solving
42 + 16n = 80

Solving for variable 'n'.

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

Add '-42' to each side of the equation.
42 + -42 + 16n = 80 + -42

Combine like terms: 42 + -42 = 0
0 + 16n = 80 + -42
16n = 80 + -42

Combine like terms: 80 + -42 = 38
16n = 38

Divide each side by '16'.
n = 2.375

Simplifying
n = 2.375