SOLUTION: there were four times as many boys as girls at a party. After 105 boys left the party, there were twice as many girls as boys left. How many children were there altogether at first
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Question 867384: there were four times as many boys as girls at a party. After 105 boys left the party, there were twice as many girls as boys left. How many children were there altogether at first? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Let = the number of boys at first
Let = the number of girls at first
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(1)
(2)
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Substitute (1) into (2)
(2)
(2)
(2)
(2)
and, since
(1)
(1)
(1)
----------------------
The number of children
at first =
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check answer:
(2)
(2)
(2)
(2)
OK
