f(n)=-12+4(n-1)

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Solution for f(n)=-12+4(n-1) equation: 


Simplifying
f(n) = -12 + 4(n + -1)

Multiply f * n
fn = -12 + 4(n + -1)

Reorder the terms:
fn = -12 + 4(-1 + n)
fn = -12 + (-1 * 4 + n * 4)
fn = -12 + (-4 + 4n)

Combine like terms: -12 + -4 = -16
fn = -16 + 4n

Solving
fn = -16 + 4n

Solving for variable 'f'.

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

Divide each side by 'n'.
f = -16n-1 + 4

Simplifying
f = -16n-1 + 4

Reorder the terms:
f = 4 + -16n-1

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