Răspuns:
4kgmere........5kgpere........35lei/×3
7kgmere........3kgpere........44lei/×5
12kgmere.......15kgpere.......105lei
35kgmere.......15kgpere.......220lei
35-12=23kgmere.....................115lei/:23
1kgmere=5lei
5×4=20(4kgmere)
35-20=15(5kgpere)
15:5=3lei 1kg de pere