F(7)=-2x+3

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Solution for F(7)=-2x+3 equation: 



(7)=-2F+3

We move all terms to the left:

(7)-(-2F+3)=0

We get rid of parentheses

2F-3+7=0

We add all the numbers together, and all the variables

2F+4=0

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

2F=-4

F=-4/2

F=-2

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