an=-50+15(n-1)

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Solution for an=-50+15(n-1) equation: 


Simplifying
an = -50 + 15(n + -1)

Reorder the terms:
an = -50 + 15(-1 + n)
an = -50 + (-1 * 15 + n * 15)
an = -50 + (-15 + 15n)

Combine like terms: -50 + -15 = -65
an = -65 + 15n

Solving
an = -65 + 15n

Solving for variable 'a'.

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

Divide each side by 'n'.
a = -65n-1 + 15

Simplifying
a = -65n-1 + 15

Reorder the terms:
a = 15 + -65n-1

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