a(n)=A(1)+(n-1)8

Solution for a(n)=A(1)+(n-1)8 equation:

Simplifying
a(n) = A(1) + (n + -1) * 8

Multiply a * n
an = A(1) + (n + -1) * 8

Reorder the terms for easier multiplication:
an = 1A + (n + -1) * 8

Reorder the terms:
an = 1A + (-1 + n) * 8

Reorder the terms for easier multiplication:
an = 1A + 8(-1 + n)
an = 1A + (-1 * 8 + n * 8)
an = 1A + (-8 + 8n)

Reorder the terms:
an = -8 + 1A + 8n

Solving
an = -8 + 1A + 8n

Solving for variable 'a'.

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

Divide each side by 'n'.
a = -8n-1 + n-1A + 8

Simplifying
a = -8n-1 + n-1A + 8

Reorder the terms:
a = 8 + -8n-1 + n-1A