an=7(n-1)*15

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Solution for an=7(n-1)*15 equation: 


Simplifying
an = 7(n + -1) * 15

Reorder the terms:
an = 7(-1 + n) * 15

Reorder the terms for easier multiplication:
an = 7 * 15(-1 + n)

Multiply 7 * 15
an = 105(-1 + n)
an = (-1 * 105 + n * 105)
an = (-105 + 105n)

Solving
an = -105 + 105n

Solving for variable 'a'.

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

Divide each side by 'n'.
a = -105n-1 + 105

Simplifying
a = -105n-1 + 105

Reorder the terms:
a = 105 + -105n-1

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