A(n)=-5.5+(n-1)(2)

Solution for A(n)=-5.5+(n-1)(2) equation:

Simplifying
A(n) = -5.5 + (n + -1)(2)

Multiply A * n
nA = -5.5 + (n + -1)(2)

Reorder the terms:
nA = -5.5 + (-1 + n)(2)

Reorder the terms for easier multiplication:
nA = -5.5 + 2(-1 + n)
nA = -5.5 + (-1 * 2 + n * 2)
nA = -5.5 + (-2 + 2n)

Combine like terms: -5.5 + -2 = -7.5
nA = -7.5 + 2n

Solving
nA = -7.5 + 2n

Solving for variable 'n'.

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

Add '-2n' to each side of the equation.
-2n + nA = -7.5 + 2n + -2n

Combine like terms: 2n + -2n = 0
-2n + nA = -7.5 + 0
-2n + nA = -7.5

Reorder the terms:
7.5 + -2n + nA = -7.5 + 7.5

Combine like terms: -7.5 + 7.5 = 0.0
7.5 + -2n + nA = 0.0

The solution to this equation could not be determined.