N+n+(n-8)=42

Solution for N+n+(n-8)=42 equation:

Simplifying
N + n + (n + -8) = 42

Reorder the terms:
N + n + (-8 + n) = 42

Remove parenthesis around (-8 + n)
N + n + -8 + n = 42

Reorder the terms:
-8 + N + n + n = 42

Combine like terms: n + n = 2n
-8 + N + 2n = 42

Solving
-8 + N + 2n = 42

Solving for variable 'N'.

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

Add '8' to each side of the equation.
-8 + N + 8 + 2n = 42 + 8

Reorder the terms:
-8 + 8 + N + 2n = 42 + 8

Combine like terms: -8 + 8 = 0
0 + N + 2n = 42 + 8
N + 2n = 42 + 8

Combine like terms: 42 + 8 = 50
N + 2n = 50

Add '-2n' to each side of the equation.
N + 2n + -2n = 50 + -2n

Combine like terms: 2n + -2n = 0
N + 0 = 50 + -2n
N = 50 + -2n

Simplifying
N = 50 + -2n