an=2+4(n-1)

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Solution for an=2+4(n-1) equation: 


Simplifying
an = 2 + 4(n + -1)

Reorder the terms:
an = 2 + 4(-1 + n)
an = 2 + (-1 * 4 + n * 4)
an = 2 + (-4 + 4n)

Combine like terms: 2 + -4 = -2
an = -2 + 4n

Solving
an = -2 + 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 = -2n-1 + 4

Simplifying
a = -2n-1 + 4

Reorder the terms:
a = 4 + -2n-1

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