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​john has 2 cousins. Their ages total to 19. One cousin is 4 years more than twice the age of the ot

Mathematics
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john has 2 cousins. Their ages total to 19. One cousin is 4 years more than twice the age of the other cousin. Find the age of both cousins. 

Mar 17th, 2015

Let x = age of one cousin

Let y = age of the other cousin

x + y = 19

x = 2y + 4

Now substitute:

2y + 4 + y = 19

3y = 15

y = 5

x = 19 - 5 = 14

Therefore,

the older cousin is 14 years old

the younger cousin is 5 years old

Mar 17th, 2015

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