F(4)=-2x-3

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Solution for F(4)=-2x-3 equation: 



(4)=-2F-3

We move all terms to the left:

(4)-(-2F-3)=0

We get rid of parentheses

2F+3+4=0

We add all the numbers together, and all the variables

2F+7=0

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

2F=-7

F=-7/2

F=-3+1/2

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