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August 22nd, 2012, 02:33 AM   #1
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Ratios

In a concert, the ratio of the numbers of adults to the number of children is 3:4. If 60 more adults join in the concert, the number of adults will be twice the number of children. How many children are in the concert?

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August 22nd, 2012, 04:58 AM   #2
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Re: Ratios

Quote:
Originally Posted by linhbui
In a concert, the ratio of the numbers of adults to the number of children is 3:4. If 60 more adults join in the concert, the number of adults will be twice the number of children. How many children are in the concert?
a = 3c / 4
a + 60 = 2c

Solve for c

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August 22nd, 2012, 05:53 AM   #3
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Re: Ratios

Quote:
Originally Posted by Denis
Quote:
Originally Posted by linhbui
In a concert, the ratio of the numbers of adults to the number of children is 3:4. If 60 more adults join in the concert, the number of adults will be twice the number of children. How many children are in the concert?
a = 3c / 4
a + 60 = 2c

Solve for c

NOTE: if you ask us to do ALL YOUR work and you simply submit the answer(s) we give you, without
taking time to understand....then there's a good job as Burger Flipper at BurgerKing waiting foy you

im only 8 -.-'
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August 22nd, 2012, 06:13 AM   #4
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Re: Ratios

Just as Denis posted (he used a = adult and c = children) :





Can you substitute (2) in (1) now?

Balarka

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August 22nd, 2012, 06:24 AM   #5
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Re: Ratios

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Originally Posted by mathbalarka
Just as Denis posted (he used a = adult and c = children) :





Can you substitute (2) in (1) now?

Balarka

.

thanx :3
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