a=4+(n-1)(-3)

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Solution for a=4+(n-1)(-3) equation: 


Simplifying
a = 4 + (n + -1)(-3)

Reorder the terms:
a = 4 + (-1 + n)(-3)

Reorder the terms for easier multiplication:
a = 4 + -3(-1 + n)
a = 4 + (-1 * -3 + n * -3)
a = 4 + (3 + -3n)

Combine like terms: 4 + 3 = 7
a = 7 + -3n

Solving
a = 7 + -3n

Solving for variable 'a'.

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

Simplifying
a = 7 + -3n

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