an=17+(n-1)(-3)

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Solution for an=17+(n-1)(-3) equation: 


Simplifying
an = 17 + (n + -1)(-3)

Reorder the terms:
an = 17 + (-1 + n)(-3)

Reorder the terms for easier multiplication:
an = 17 + -3(-1 + n)
an = 17 + (-1 * -3 + n * -3)
an = 17 + (3 + -3n)

Combine like terms: 17 + 3 = 20
an = 20 + -3n

Solving
an = 20 + -3n

Solving for variable 'a'.

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

Divide each side by 'n'.
a = 20n-1 + -3

Simplifying
a = 20n-1 + -3

Reorder the terms:
a = -3 + 20n-1

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