Question

x pe 2=y pe 3=z pe 5; x+y+z=80 Aflati :x;y;z

Answer 1

$\frac{x}{2} = \frac{y}{3} = \frac{z}{5} =k~(constanta~de~proportionalitate) \\ \\ x=2k;~y=3k;~z=5k; \\ \\ x+y+z=80 \\ 2k+3k+5k=80 \\ 10k=80 \\ k=8 \\ \\ x=2*8 \\ x=16 \\ \\ y=3*8 \\ y=24 \\ \\ z=5*8 \\ z=40$