If FG = 9, GH = 4x, and FH = 7x, what is GH? By segment addition, we have: FG + GH = FH Substituting in the values given, we have: 9 + 4x = 7x To solve this equation for x, we type it in our math engine and we get: x = 3 The question asks for GH, so with x = 3, we have: GH = 4(3) GH = 12