Answer :

The line segment FG can be represented as expression 4x whose midpoint is N

We are provided with that Point N is the midpoint of FG and FN = 2x and We need to find expression that  represents FG

As N is the midpoint of line segment FG than FN = NG

Also it could be written as FG = FN + NG because FG is the broken into two different line segment FN and NG because of the midpoint N

Therefore, FN = 2x which means FN= NG=2x

So, we can write an expression that could represent FG

FG = FN + NG

FG = 2x + 2x

FG = 4x

Hence, The line segment FG can be represented as expression 4x

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