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

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

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

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

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

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

Combine like terms: -1 + 2 = 1
nA = 1 + -2n

Solving
nA = 1 + -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 = 1 + -2n + 2n

Combine like terms: -2n + 2n = 0
2n + nA = 1 + 0
2n + nA = 1

Reorder the terms:
-1 + 2n + nA = 1 + -1

Combine like terms: 1 + -1 = 0
-1 + 2n + nA = 0

The solution to this equation could not be determined.