Two ostrich breeders, Mandy and Marcia, were talking one day, and noticed that, Mandy would have exactly as many ostriches as Marcia if Mandy sold Marcia seven ostriches.
On the other hand, if Marcia sold Mandy seven ostriches, then Mandy would have exactly twice as many ostriches as Marcia. How many ostriches did each have?
Answer
Mandy had 49 and Marcia had 35.
