David and Peter had $90 and $200 respectively. They were each given an equal amount of money. Then Peter had twice as much money as David. How much money did each boy receive?

Question

David and Peter had $90 and $200 respectively.  They were each given an equal amount of money.  Then Peter had twice as much money as David.  How much money did each boy receive?

anonymous · Accepted Answer

I think it should be calculated like this: Let x be the amount of money each boy received 2*(90+x)=200+x or 90+x=(200+x)/2 180+2x=200+x x=20 Therefore, each boy received $20