2 cutii cereale .... 3 cutii paste...2 160 g |×2
4 cutii cereale ... 4 cutii paste ... 352 dag= 3520 g
4 cutii cereale ... 6 cutii paste ... 4320 g
4 cutii cereale... 4 cutii paste ... 3520 g
_______________________________ ( - )
// ... ... 2 cutii paste ... 800 g
1 cutie paste = 800 : 2 = 400 g
3 cutii paste = 3×400 = 1 200 g
1 cutie cereale = (2160-1200) : 2 = 960:2=480 g