16s+4b=24L
4s+6b=16L
Folosim metoda comparativa.
16s+4b=24L >putem sa impartim la 4 dar nu aceasta ecuatie o schimbam.
4s+6b=16L *4
16s+4b=24L
16s+24b=64L > 64-24=40 (litri in 20 bidoane)
litri intr-un bidon=40:20=2 (litri 1 bidon)
16s+8=24
16s=24-8
16s=16 L
1s=16:16=1L intr-o sticla