F(3)=3x+20

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Solution for F(3)=3x+20 equation: 



(3)=3F+20

We move all terms to the left:

(3)-(3F+20)=0

We get rid of parentheses

-3F-20+3=0

We add all the numbers together, and all the variables

-3F-17=0

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

-3F=17

F=17/-3

F=-5+2/3

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