SOLUTION: there is a group of boys and girl waiting for the school buses . 15 girls get on the first bus.The ratio of boys to girls at the stop is now 7:4. 12 boys get on the next bus.the

Question 874525: there is a group of boys and girl waiting for the school buses .
15 girls get on the first bus.The ratio of boys to girls at the stop is now 7:4.
12 boys get on the next bus.the ratio of boys to girls at the stop is now 1:1
How many students where there at the stop to start with.
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

 

Hi

 4b -7g = -105

  b - g = -3

4b-7g = -105

 b -g = -3     times -7 add to first

  -3b = -84

    b = 28  and g =31  at the stop to start with

checking

 28/(31-15) = 28/16 = 7/4



   

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