an=7+(n-1)

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


Simplifying
an = 7 + (n + -1)

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

Remove parenthesis around (-1 + n)
an = 7 + -1 + n

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

Solving
an = 6 + n

Solving for variable 'a'.

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

Divide each side by 'n'.
a = 6n-1 + 1

Simplifying
a = 6n-1 + 1

Reorder the terms:
a = 1 + 6n-1

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