an=7+(n-1)4

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


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

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

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

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

Solving
an = 3 + 4n

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 + 4

Simplifying
a = 3n-1 + 4

Reorder the terms:
a = 4 + 3n-1

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