an=7+(n-1)9

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Solution for an=7+(n-1)9 equation: 


Simplifying
an = 7 + (n + -1) * 9

Reorder the terms:
an = 7 + (-1 + n) * 9

Reorder the terms for easier multiplication:
an = 7 + 9(-1 + n)
an = 7 + (-1 * 9 + n * 9)
an = 7 + (-9 + 9n)

Combine like terms: 7 + -9 = -2
an = -2 + 9n

Solving
an = -2 + 9n

Solving for variable 'a'.

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

Divide each side by 'n'.
a = -2n-1 + 9

Simplifying
a = -2n-1 + 9

Reorder the terms:
a = 9 + -2n-1

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