MaichBlack wrote: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) = 27kgs Its just easier to add your three equations together
x+y =10
x + z=20
y+z=24
By adding the three equations the left hand side will be 2x+2y+2z
while the Right hand side will be = 10+20+24
divide each side by 2 then you are left with
x+y+z = 27
You will know that you have arrived when money and time are not mutually exclusive "events" in you life!