Question

7,8,9 Repede dau coroana

Answer 1

7.
Intr-un sac-35 kg
In alt sac-29 kg
               ______
          Total : 64 kg : 8 kg = 8 pungi

8.
a+b=27
a=b+7
b+7+b=27
2b=20 =>b=10 kg si a=17 kg

9.
a+b+c=44
b=3a
c=b+2 sau c=3a+2
a+3a+3a+2=44
7a=42 =>a=6 =>b=18 si c=20