Question

va rog frumos 14 si 15​

Answer 1

Răspuns:

Aici ai rezolvarea! Sper că te-am ajutat

Answer 2

Răspuns:

x/y=3/5=>5x=3y

y-x=20 I·3

3y-3x=60=>5x-3x=60=>2x=60=>x=60:2=>x=30

x/(y-x)=30/20=3/2

___________

5x/2y=2/5=>5·5x=2·2y=>25x=4y I:2=>5x=2y

5x+2y=56=>2y+2y=56=>4y=56=>y=56:4=>y=14

(5x+2y)/2y=56/(2·14)=56/28=2