Question

Aflati x si y stiind ca x + y = 20 si ca x\y = 4/6 ajutor va rog !

Answer 1

Din x+y=20 => x=20-y
x/y=4/6 (prod mezilor = prod extremilor) => 6x=4y
Inlocuim in relatia 2 si obtinem 6(20-y)=4y =>120-6y=4y =>120=10y=>y=12
revenim la prima relatie si inlocuim y: x=20-12=>x=8

Answer 2

x+y=20 =>x=20-y
x/y=4/6 => (20-y)/y=4/6 => 6(20-y)=4y => 120-6y= 4y => 10y=120 => y=12
x=20-y= 20-12=8