Homework Help: math

Posted by RACHEL on Saturday, April 18, 2009 at 1:19pm.

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?

math - anonymous, Saturday, April 18, 2009 at 3:57pm
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

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