SOLUTION: Two boys for every 7 girls attended an event. There were 250 more girls that attended the event. How many boys attended?

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Question 781007: Two boys for every 7 girls attended an event. There were 250 more girls that attended the event. How many boys attended?
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
b=number of boys.
b+250=number of girls
.
b/(b+(b+250))=2/9
b/(2b+250)=2/9
b=2(2b+250)/9
=(4b+500)/9
9b=4b+500
5b=500
b=100 boys
.
Ed