f(-3)=8(-3)-4

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Solution for f(-3)=8(-3)-4 equation: 



f(-3)=8(-3)-4

We move all terms to the left:

f(-3)-(8(-3)-4)=0

We add all the numbers together, and all the variables

f(-3)+28=0

We multiply parentheses

-3f+28=0

We move all terms containing f to the left, all other terms to the right

-3f=-28

f=-28/-3

f=9+1/3

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