a=15+5(n-1)

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Solution for a=15+5(n-1) equation: 


Simplifying
a = 15 + 5(n + -1)

Reorder the terms:
a = 15 + 5(-1 + n)
a = 15 + (-1 * 5 + n * 5)
a = 15 + (-5 + 5n)

Combine like terms: 15 + -5 = 10
a = 10 + 5n

Solving
a = 10 + 5n

Solving for variable 'a'.

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

Simplifying
a = 10 + 5n

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