an=9+4n

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Solution for an=9+4n equation: 


Simplifying
an = 9 + 4n

Solving
an = 9 + 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 = 9n-1 + 4

Simplifying
a = 9n-1 + 4

Reorder the terms:
a = 4 + 9n-1

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