F(x)=18x+21

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Solution for F(x)=18x+21 equation: 



(F)=18F+21

We move all terms to the left:

(F)-(18F+21)=0

We get rid of parentheses

F-18F-21=0

We add all the numbers together, and all the variables

-17F-21=0

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

-17F=21

F=21/-17

F=-1+4/17

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