Question

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

Answer 1

x/0,1 = y/0,2 = z/0,3 = k
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