F(x)=100-3x

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Solution for F(x)=100-3x equation: 



(F)=100-3F

We move all terms to the left:

(F)-(100-3F)=0

We add all the numbers together, and all the variables

F-(-3F+100)=0

We get rid of parentheses

F+3F-100=0

We add all the numbers together, and all the variables

4F-100=0

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

4F=100

F=100/4

F=25

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