a+b+c=? a)|___|___|___|___|___|=>5b
a:b=5,,,=>b=a:5 b) |___!
c:b=3...=>b=c:3 c) |___|___|___|=>3b
--------------------- --------------------------------------------
a=? b=? c=? 5b-3b=36...=>...2b=36
2b=36
b=36:2
b=18
a=18*5
a=90
c=18*3
c=54
90+18+54=162
verificare
90:18=5
54:18=3