f(n)=7-2(n-1)

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Solution for f(n)=7-2(n-1) equation: 


Simplifying
f(n) = 7 + -2(n + -1)

Multiply f * n
fn = 7 + -2(n + -1)

Reorder the terms:
fn = 7 + -2(-1 + n)
fn = 7 + (-1 * -2 + n * -2)
fn = 7 + (2 + -2n)

Combine like terms: 7 + 2 = 9
fn = 9 + -2n

Solving
fn = 9 + -2n

Solving for variable 'f'.

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

Divide each side by 'n'.
f = 9n-1 + -2

Simplifying
f = 9n-1 + -2

Reorder the terms:
f = -2 + 9n-1

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