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Old 09-24-2012   #2
MAS1

 
Join Date: Dec 2008
Posts: 249
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Quote:
Originally Posted by Mr. Hui View Post
Julio is 36 years old, and James is 11 years old. In how many years will Julio's age be twice James's age?
Let x be the number of years.

36 + x = 2(11 + x)
36 + x = 22 + 2x
36 + x - x = 22 + 2x - x
36 = 22 + x
36 - 22 = 22 - 22 + x
14 = x

So in 14 years Julio will be 50 and James will be 25.
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