Notam cele 3 bazine cu a,b si c .
a+b+c = 3 942 l
a+b = 2 503 l
c = 3 942 -2 503 = 1 439 l (in al 3-lea bazin)
c = a+292 => a = c - 292
a = 1 439 -292 = 1 147 l (in primul bazin)
b = 2 503 - 1 147 = 1 356 (in al 2-lea bazin)
Verificare:
1 147 + 1 356 + 1 439 = 3 942 l