a,b,c
= ?
a/2=b/3=c/5 = k rezulta a=2k
b=3k
c=5k
3a+4b+5c=860
3*2k+4*3k+5*5k=860
6k+12k+25k=860
43k=860
k=20 a=2k=2*20=40
b=3k=3*20=60
c=5k=5*20=100