SOLUTION: if the ratio of boy to girl in class is 3:4 and there is 28 people in class how many girls are they in the class

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Question 469224: if the ratio of boy to girl in class is 3:4 and there is 28 people in class how many girls are they in the class
Answer by Tatiana_Stebko(1539) About Me  (Show Source):
You can put this solution on YOUR website!
Let x is the ratio coefficient
Then in class 3x boys and 4x girls, together 3x%2B4x=28
7x=28
x=28%2F7
x=4
There are 3%2A4=12 boys and 4%2A4=16 girls in class