Question

A. 4/x = y/21 = 28/29

B. x/y = 21/28

Tìm x,y

 

Answer 1

a: 4/x=y/21=28/29

=>x=4:28/29=29/7; y=28/29x21=588/29

b: x/y=21/28

nên x/y=3/4

=>4x=3y