Video
Age word problem: Ben & William (Full video)
Khan Academy
Supporting grades: 8
Description: Sal solves the following age word problem: William is 4 times as old as Ben. 12 years ago, William was 7 times as old as Ben. How old is Ben now? Created by Sal Khan. Let's do some more of these classic age word problems. So we're told that William is 4 times as old as Ben. 12 years ago, William was 7 times as old as Ben.
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