(a;b;c) d.p. (5;6;10) => a/5=b/6=c/10
(c;d;e) d.p. (3;8;12) => c/3=d/8=e/12
=>a=5c/10
=c/2
=>b=6c/10
=3c/5
=>d=8c/3
=>e=12c/3
=4c
a+b+c+d+e=200
c/2+3c/5+c/1+8c/3+4c/1=200/1
15c/30+18c/30+30c/30+80c/30+120c/30=6000/30
=>15c+18c+30c+80c+120c=6000
263c=6000
c=6000/263
a=6000:2/263=3000/363
b=6000/263 × 3/5 = 3600/263
d=6000/263 × 8/3 = 1600/263
e=6000/263 × 4 = 24000/263