9=3(n+1)

Solution for 9=3(n+1) equation:

Simplifying
9 = 3(n + 1)

Reorder the terms:
9 = 3(1 + n)
9 = (1 * 3 + n * 3)
9 = (3 + 3n)

Solving
9 = 3 + 3n

Solving for variable 'n'.

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

Add '-3n' to each side of the equation.
9 + -3n = 3 + 3n + -3n

Combine like terms: 3n + -3n = 0
9 + -3n = 3 + 0
9 + -3n = 3

Add '-9' to each side of the equation.
9 + -9 + -3n = 3 + -9

Combine like terms: 9 + -9 = 0
0 + -3n = 3 + -9
-3n = 3 + -9

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

Divide each side by '-3'.
n = 2

Simplifying
n = 2