Mr rainwater has 9 goats and 36 cows and 6 horses on his farm. He has 4 times as many cows as chickens. How many chickens does he have?

Answer 1

4x = 36
x = 9

So -- 9 chickens

Answer 2

That is the same answer that I got but somebody told me it was wrong. Can't see how it is wrong because the only two variants are the cows and chickens.