SOLUTION: Hi 1/3 of the children were boys.when 20 boys left, the number of boys decreased to 1/4 of the total number of children. How many children were at first. thanks

Question 1103435: Hi
1/3 of the children were boys.when 20 boys left, the number of boys decreased to 1/4 of the total number of children. How many children were at first.
thanks
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = the original number of children
= the original number of boys
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There were 180 children at first
-------------------------------
check:
1/3 were boys, so were boys
20 left, leaving 40 boys
The total number of children was then

OK
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