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 linhbui August 22nd, 2012 02:33 AM

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?

thank you :)

 Denis August 22nd, 2012 04:58 AM

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

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 :idea:

 linhbui August 22nd, 2012 05:53 AM

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 :idea:

im only 8 -.-'

 mathbalarka August 22nd, 2012 06:13 AM

Re: Ratios

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

$\text{Adult} : \text{Children}= 3:4 \;\;\; (1)$

$\text{Adult} + 60= 2 \cdot \text{Children} \;\;\; (2)$

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

Balarka

.

 linhbui August 22nd, 2012 06:24 AM

Re: Ratios

Quote:
 Originally Posted by mathbalarka Just as Denis posted (he used a = adult and c = children) : $\text{Adult} : \text{Children}= 3:4 \;\;\; (1)$ $\text{Adult} + 60= 2 \cdot \text{Children} \;\;\; (2)$ Can you substitute (2) in (1) now? Balarka .

thanx :3

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