Odgovor:
# GQ = 25 #
Pojasnilo:
Kot # Q # je sredina # GH #, imamo # GQ = QH # in
# GH = GQ + QH = 2xxGQ #
Zdaj kot # GQ = 2x + 3 #, in # GH = 5x 5 #, imamo
# 5x-5 = 2xx (2x + 3) #
ali # 5x-5 = 4x + 6 #
ali # 5x-4x = 6 + 5 #
t.j. # x = 11 #
Zato # GQ = 2xx11 + 3 = 22 + 3 = 25 #
