F(x)=3.x+5

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Solution for F(x)=3.x+5 equation: 



(F)=3.F+5

We move all terms to the left:

(F)-(3.F+5)=0

We get rid of parentheses

F-3.F-5=0

We add all the numbers together, and all the variables

-2F-5=0

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

-2F=5

F=5/-2

F=-2+1/2

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