GH=17
1) Since GI is the midpoint then, it is fair to say that
GH is congruent to HI
So, 5x +2 =9x-10
5x+2-9x=9x-9x-10
-4x+2=-10
-4x+2-2=-10-2
-4x=-12
x=3
2) The question wants GH
Let's plug x =3
5(3) +2
15+2
17
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