Question

Numerele x,y,z sunt direct proportionale cu 0,1 0,2 0,3 iar 3x+2y+5z=110.Aflati x,y,z

Answer 1

X/1/10=Y/2/10=Z/3/10=k rezulta X=1/10(ori)k Y=2/10(ori)k Z=3/10(ori)k 3x1/10k+2x2/10k+5x3/10k=110 3/10k+4/10k+15/10k=110 22/10k=110 K=110/1:22/10 K=110/1 ori 10/22(se simplifica 110 cu 22 si in loc de 22 ramane 1 si in loc de 110 ramane 5) K=5 ori 10 K=50 X=1/10 ori 50 X=5 Y=2/10 ori 50 Y=10 Z=3/10 ori 50 Z=15