Răspuns:
38 pah iaurt...................14pah sman..................132lei /:2
36pah iaurt....................7 pah sman....................100lei
19 pah iaurt...................7 pah sman....................66lei
36pah iaurt....................7 pah sman....................100lei
100-66=34lei
36-19=17
aflam cat costa un pahar cu iaurt
34:17=2lei
aflam cat costa 19 pahare cu iaurt
19×2=38lei
aflam cat costa 7 pahare cu smantana
66-38=28lei
aflam cat costa un pahar cu smantana
28:7=4lei