SOLUTION: A zoo has some lions and ostriches. Pet Sitting guy spoke 15 heads and 50 legs. How many lions?

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Question 821787: A zoo has some lions and ostriches. Pet Sitting guy spoke 15 heads and 50 legs. How many lions?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

A zoo has some lions and ostriches. 

A zoo has green%28x%29 lions  and green%28y%29ostriches 

Pet Sitting guy spoke 15 heads and 50 legs. How many lions?

   x + y = 15  0r  y =+15-x

  4x + 2y = 50

  4x + 2(15-x) = 50   |Substituting for y

         2x = 20

          x = highlight_green%2810%29 lions

  CHECKING our answer***

  40 + 10 = 50 legs