SOLUTION: There are sparrows and pigeons on a fence. When five sparrows leave, there remain two pigeons for every sparrow. Then twenty-five pigeons leave, and there are now three sparrows

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Question 250358: There are sparrows and pigeons on a fence. When five sparrows leave, there remain two pigeons for every sparrow. Then twenty-five pigeons leave, and there are now three sparrows for every pigeon. Find the original number of sparrows.
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
let x= number of birds on fence
p+s=x
2(s-5)=p
(s-5) =3*(p-25)