an=4+(n-1)(7)

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Solution for an=4+(n-1)(7) equation: 


Simplifying
an = 4 + (n + -1)(7)

Reorder the terms:
an = 4 + (-1 + n)(7)

Reorder the terms for easier multiplication:
an = 4 + 7(-1 + n)
an = 4 + (-1 * 7 + n * 7)
an = 4 + (-7 + 7n)

Combine like terms: 4 + -7 = -3
an = -3 + 7n

Solving
an = -3 + 7n

Solving for variable 'a'.

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

Divide each side by 'n'.
a = -3n-1 + 7

Simplifying
a = -3n-1 + 7

Reorder the terms:
a = 7 + -3n-1

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