Răspunsuri

2014-08-04T13:44:17+03:00
(x+y)/(2x+y)=4/5

5(x+y)=4(2x+y)

5x+5y=8x+4y

5x-8x =4y-5y

-3x =-y

3x=y

x/y= 3
4 4 4