Question 818439: A guide dog training center took half of the puppies at the dog pound. Steve took half of the remaining. Tanya took the 5 that were left. How many puppies were there to begin with?
Answer by TimothyLamb(4379)   (Show Source):
You can put this solution on YOUR website! g = D/2
s = (D - D/2)/2
s = (D/2 - D/4)
s = (2D/4 - D/4) = D/4
D - g - s = 5
D - D/2 - D/4 = 5
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D - D/2 - D/4 = 5
4D/4 - 2D/4 - D/4 = 5
D/4 = 5
D = 20
guide = 10
steve = 5
tanya = 5
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total pups: 20
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