Mohon Bantuannya dong. jawabnya + pake jalannya... ya :)

5. A/A+B = E/F
= 6/10 = 3/x
= x = 30/6 = 5

6. A/B = C/D
= x/2 = 6/4
= x = 12/4 = 3

y = A/A+B = E/F
   = 3/5 = y/10
   = y = 30/5 = 6

gampang kok sebenernya, tinggal makek perbandingan aja