an=7(n-1)-12

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Solution for an=7(n-1)-12 equation: 


Simplifying
an = 7(n + -1) + -12

Reorder the terms:
an = 7(-1 + n) + -12
an = (-1 * 7 + n * 7) + -12
an = (-7 + 7n) + -12

Reorder the terms:
an = -7 + -12 + 7n

Combine like terms: -7 + -12 = -19
an = -19 + 7n

Solving
an = -19 + 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 = -19n-1 + 7

Simplifying
a = -19n-1 + 7

Reorder the terms:
a = 7 + -19n-1

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