Răspuns:
690q+870q=1560q(in al treilea siloz)
690q+870q+1560q=3120(in total)
6030q-3120q=2910q(s-au luat)
2910q÷3=970q(cantitati egale de cereale)
in primul siloz=690q+970q=1660q
in al doilea siloz=870q+970q=1840q
in al treilea siloz=1560q+970q=2530q
verificare:(2530+1840)+1660=4270+1660=6030