tolong di jawab pake cara ya jawab sebisanya aja help me.... >_<

[tex]5. \: \frac{2x - 4}{x} = \frac{x + 10}{2x - 4} \\ 4 {x}^{2} - 16x + 16 = {x}^{2} + 10x \\ 3 {x}^{2} - 26x + 16 = 0 \\ x = \frac{26 \frac{ + }{ - } \sqrt{676 - 4.3.16} }{2.3} = \frac{26 \frac{ + }{ - }22 }{6} = \frac{48}{6} = 8[/tex]
8, 12, 18
r = 3/2