a+b=890 litri a=4xb 4b+b=890 5b=890 b=178 litri a=4x178 a=712 litri
a+b=890 4b+b=890; 5b=890; b=890:5; b=178a=4b a=178x4; a= 712
a+b=890 litri a=4xb 4b+b=890 5b=890 b=178 litri a=4x178 a=712 litri
a+b=890 4b+b=890; 5b=890; b=890:5; b=178a=4b a=178x4; a= 712