Rezolvare:
1) 4 oi+3 cai=33 kg nutret
4 oi+2 cai=26 kg nutret
observam daca scadem cele doua relatii ca:
1 cal=33 kg-26 kg
1 cal consuma 7 kg nutret
4 oi+2x7 kg=26 kg
4 oi=26 kg-14 kg
4oi =12 kg
o oaie consuma 12 kg:4=3 kg
2)
3 mere=12 prune
6 mere+8 prune=960 gr.
12prune x2+8 prune=960g
32 prune=960g
1 pruna=960g:32
1 pruna=30 g
1 mar=12prune :3=4 prune=4x30 g=120 g
Raspuns: 1 mar cantareste 120 g,iar o pruna cantareste 30 g
verific 6x120g+8x30 g=720g+240g=960 g