Word Problem, Lvl 5, Q#2 - XP Math - Forums

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 09-23-2012 #1 Mr. Hui     Join Date: Mar 2005 Posts: 10,609 Word Problem, Lvl 5, Q#2 Julio is 36 years old, and James is 11 years old. In how many years will Julio's age be twice James's age? __________________ Do Math and you can do Anything!
09-24-2012   #2
MAS1

Join Date: Dec 2008
Posts: 249

Quote:
 Originally Posted by Mr. Hui 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.

 09-25-2012 #3 Mr. Hui     Join Date: Mar 2005 Posts: 10,609 Thanks, MAS1. I always prefer an elegant algebraic solution. In the book, this is a 5th grade problem. Can anyone find a way to solve it without algebra? __________________ Do Math and you can do Anything!
 11-01-2012 #4 ahmed     Join Date: Apr 2011 Posts: 821 36 11 i know its a lot of work but still works 37 12 38 13 39 14 40 15 41 16 42 17 43 18 44 19 45 20 46 21 47 22 48 23 49 24 50 25 __________________ live your life
01-26-2013   #5

Join Date: Oct 2012
Posts: 340

Quote:
 Originally Posted by MAS1 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.
that is very hard for 5th grade. but you are smarter than 5th grade.

 01-26-2013 #6 imad 150     Join Date: Oct 2012 Posts: 340 36 11 37 12 38 13 39 14 40 15 41 16 42 17 43 18 44 19 45 20 46 21 47 22 48 23 49 24 50 25 Last edited by imad 150; 04-25-2013 at 11:00 PM..
 04-08-2013 #7 Vampire Queen     Join Date: Feb 2013 Posts: 96 *confused face* __________________ My life is always lonely and sad It needs friends(maybe even boyfriends)to fill it.
 04-08-2013 #8 JosePereira11     Join Date: May 2011 Posts: 124 Best answer without using formulas: We start at 11 - 36 36/2=18 so, 18 - 36+7 = 18 - 43 43/2=22.5 so, 23 - 43+5 = 23 - 48 48/2=24 so, 24 - 49 49/2= 24.5 so, 25 - 50 Done. In 14 years. __________________ You need only 2 objectives in life: when you look at the past and you say that you coudn't have done any better than that is the 1º one. The 2º one is to do better than that Then, you must learn 2 rules in your life: Rule number one : respect yourself and the others Rule number two: first learn rule number one
 07-04-2013 #9 james_smith   Join Date: Jul 2013 Posts: 1 The best answer would be: given, James- 11 years Julio- 36 years After some years Julio will be twice the age of James. Julio = 2 * James. consider year wise. first, Left hand side should be always >= to Right Hand Side So, consider the age after 10 years add 10 on both sides: Julio + 10 = 2 * (James + 10) 36 + 10= 2 * (11 + 10) 46 = 42 46 = 42 ( which is not equal to each other) by this u can make out another 4 should be added on both side to make it LHS = RHS 36 + 14 = 2 * (11+14) So after 14 years L.H.S = R.H.S after 14 years the age of Julio will be twice the age of James.
 05-29-2015 #10 ohmio     Join Date: Apr 2015 Posts: 28 Question Dear Mr.Hui this question is for you. Although this question is a problem it is not a maths problem. The question is , what age is the game Maths Payne suitable for?

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