6+3n+n=9n+n

Solution for 6+3n+n=9n+n equation:

Simplifying
6 + 3n + n = 9n + n

Combine like terms: 3n + n = 4n
6 + 4n = 9n + n

Combine like terms: 9n + n = 10n
6 + 4n = 10n

Solving
6 + 4n = 10n

Solving for variable 'n'.

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

Add '-10n' to each side of the equation.
6 + 4n + -10n = 10n + -10n

Combine like terms: 4n + -10n = -6n
6 + -6n = 10n + -10n

Combine like terms: 10n + -10n = 0
6 + -6n = 0

Add '-6' to each side of the equation.
6 + -6 + -6n = 0 + -6

Combine like terms: 6 + -6 = 0
0 + -6n = 0 + -6
-6n = 0 + -6

Combine like terms: 0 + -6 = -6
-6n = -6

Divide each side by '-6'.
n = 1

Simplifying
n = 1