an=4+(n-1)5

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Solution for an=4+(n-1)5 equation: 


Simplifying
an = 4 + (n + -1) * 5

Reorder the terms:
an = 4 + (-1 + n) * 5

Reorder the terms for easier multiplication:
an = 4 + 5(-1 + n)
an = 4 + (-1 * 5 + n * 5)
an = 4 + (-5 + 5n)

Combine like terms: 4 + -5 = -1
an = -1 + 5n

Solving
an = -1 + 5n

Solving for variable 'a'.

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

Divide each side by 'n'.
a = -1n-1 + 5

Simplifying
a = -1n-1 + 5

Reorder the terms:
a = 5 + -1n-1

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