Answer:
4
Explanation:
It's given to us that FG and GH are on the line FH. This can also be represented with FG + GH = FH. Let's write that as an equation.
FG + GH = FH
(3x) + (x + 2) = 10
4x + 2 = 10
4x = 8
x = 2
Now that we know that x is 2, let's input it in and find GH.
(2) + 2 = 4