Question

Determinati numerele x,y si z, stiind ca x,y,z sunt direct proportionale cu 1, 3 si respectiv 6 si x+3y-z=48.

Repede

Answer 1

x/1=y/3=z/6=k=>x=k;y=3k;z=6k;x+3y-z=48=>k+3•3k-6k=48=>4k=48=>k=12=>x=12;y=36;z=72