- #1

fork

- 23

- 0

=(y+z-x)/4

=(z+x-y)/5,

then x:y:z=

A.3:4:5

B.8:7:9

C.9:16:25

D.15:12:20

The answer for the above question is option B. But I don't know how to solve this kind of questions. Can anyone tell me what should I do in the first step? Thanks for answering my question.