Question

Numerele naturale x,y,z sunt direct proportionale cu 0,1;0,2;0,3 iar 3x + 2y + 5z = 110.Aflati x, y, z.Multumesc ! P.S. Doresc un raspuns cat mai clar si rapid !

Answer 1

x=0.1k
y=0.2k
z=0.3k

0.3k+0.4k+1.5k=110
2.2k=110
k=50
x=5
y=10
z=15

Answer 2

x/1/10=y/2/10=x/3/10=k;
⇒x=k/10;
⇒y=2k/10=k/5;
⇒z=3k/10;
⇒3k/10+2k/5+k=110
⇒3k/10+4k/10+10k/10=110
⇒17k/10=110
⇒k=10·110/17
⇒k=64,7;
⇒x=6,47;
⇒y=12,94;
⇒z=19,41;