Let Cat be x kg, dog y kg and rabbit z kg.
i) x + z = 10kg
ii) y + z = 20kg
iii) x + y = 24kg
(ii) - (i ) -> y - x = 10 (equation iv)
(iv) + (iii) -> 2y = 34 -> y = 17kg
Replace y in equation (ii) with 17
17 + z = 20 -> z = 3kg.
Replace z with 3 in equation (i)
x + 3 = 10 -> x = 7kg
Cat weighs 7kgs; Dog Weighs 17kgs; Rabbit weighs 3kgs.
Total (picture 4) = 27kgsNever count on making a good sale. Have the purchase price be so attractive that even a mediocre sale gives good returns.