Question

Aflati numerele x,y si z stiind ca sunt direct proportionale cu 3,7 si 2 iar xy+yz=175

Answer 1

X / 3=y /7=z / 2= K x /3=k=x=3k y /7=k=y=7k z /2=k=z=2k 3k*7k +7k*2k=175 21k+14k=175 35k=175 k=175 : 35 k=5 x=3*5 x=15 y=7*5 y=35 z=2*5 z=10