An=12+6(n-1)

Solution for An=12+6(n-1) equation:

Simplifying
An = 12 + 6(n + -1)

Reorder the terms:
nA = 12 + 6(-1 + n)
nA = 12 + (-1 * 6 + n * 6)
nA = 12 + (-6 + 6n)

Combine like terms: 12 + -6 = 6
nA = 6 + 6n

Solving
nA = 6 + 6n

Solving for variable 'n'.

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

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

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

Reorder the terms:
-6 + -6n + nA = 6 + -6

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

The solution to this equation could not be determined.