3ore....ore...85hl apa |x2
6ore...4ore....220hl apa
6ore..10ore...70hl apa
eore...4ore....2 2 0hl apa
0 ore....ore...150hl apa
6ore=150hl apa
1ora=150-6=25 hl apa (al doilea robinet)
3X +(5x25)=185 => 3X = 185-125=> 30=> X =30+3=10
Proba: 3x10+5x25= 30+125=185
Prin primul robinet: 10 hl apa
Al doilea robinet: 25hl apa