Question

3 cats=12kg
duck+cat=5kg
sheep+duck=99kg
sheep+cat+duck=???

Answer 1

1 cat 4 kg
1 duck 1 kg
1 sheep 98kg
4+1+98=103 kg

Answer 2

1 Cat-12÷3=4kg
duck+cat=5-4(cat)=1kg
sheep+duck=99-1(duck)=98
sheep+cat+duck=98+4+103kg