perhatikan gambar di samping? Nilai X adalah...

[tex] \frac{10}{16} = \frac{20}{20 + x} \\ 10(20 + x) = 20 \times 16 \\ 200 + 10x = 320 \\ 10x = 120 \\ x = 12[/tex]
Maaf kalau salah

16/10=20+x/20
8/5 = 20+x/20
8/1 = 20+x /4
20+x = 8 x 4
20+x = 32
X = 32-20
= 12 cm