Question

Daca x supra y = 2 supra 3 atunci 3x + 2y supra y - x . Va rog mult . Imi puteti explica rezolvarea ?

Answer 1

x/y=2/3=>x/2=y/3=k=>x=2k si y=3k
3x+2y/y-x=5k+6k/k=11k/k=11

Answer 2

x/y=2/3=>x=2y/3
(3x+2y)(y-x)=(3*2y/3+2y)(y-2y/3)=(2y+2y)/(3y/3-2y/3)=4y/y/3=4y*3/y=12

sau
x/y=2/3=k=>x=2k și y=3k
(3x+2y)(y-x)=(3*2k+2*3k)/(3k-2k)=(6k+6k)/k=12k/k=12