A(n)=6+(n-1)(-1)

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

Simplifying
A(n) = 6 + (n + -1)(-1)

Multiply A * n
nA = 6 + (n + -1)(-1)

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

Reorder the terms for easier multiplication:
nA = 6 + -1(-1 + n)
nA = 6 + (-1 * -1 + n * -1)
nA = 6 + (1 + -1n)

Combine like terms: 6 + 1 = 7
nA = 7 + -1n

Solving
nA = 7 + -1n

Solving for variable 'n'.

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

Add 'n' to each side of the equation.
n + nA = 7 + -1n + n

Combine like terms: -1n + n = 0
n + nA = 7 + 0
n + nA = 7

Reorder the terms:
-7 + n + nA = 7 + -7

Combine like terms: 7 + -7 = 0
-7 + n + nA = 0

The solution to this equation could not be determined.