A(3)=5+(n-1)(2)

Solution for A(3)=5+(n-1)(2) equation:

Simplifying
A(3) = 5 + (n + -1)(2)

Reorder the terms for easier multiplication:
3A = 5 + (n + -1)(2)

Reorder the terms:
3A = 5 + (-1 + n)(2)

Reorder the terms for easier multiplication:
3A = 5 + 2(-1 + n)
3A = 5 + (-1 * 2 + n * 2)
3A = 5 + (-2 + 2n)

Combine like terms: 5 + -2 = 3
3A = 3 + 2n

Solving
3A = 3 + 2n

Solving for variable 'A'.

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

Divide each side by '3'.
A = 1 + 0.6666666667n

Simplifying
A = 1 + 0.6666666667n