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avatar+3039 

In Farmland, one cow can be exchanged for two goats, and three goats
can be exchanged for five chickens. How many chickens can six cows
be exchanged for?
 

tertre  Feb 18, 2018
 #1
avatar+12753 
+1

1c = 2g

or    c = 2g

 

3g=5f     (f= chickens)

g=5/3f     Substitute into the first equation

 

c = 2 (5/3 f)       now you have 6 cows so multiply both sides by 6

6c = (6)(2)(5/3 f) = 60/3 f = 20 f   

6 cows = 20 chickens

ElectricPavlov  Feb 19, 2018
 #2
avatar
+1

5 / 3 = 1 2/3 chickens per goat.

1 2/3 x 2 = 3 1/3 chickens per cow.

3 1/3 x 6 = 20 chickens for 6 cows!!.

Guest Feb 19, 2018
edited by Guest  Feb 19, 2018

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