SOLUTION: An eighth grade class picnic has a boy-girl ratio of 4:3. Two girls leave the class, changing the ratio to 10:7. How many students are now in the class?

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Question 468629: An eighth grade class picnic has a boy-girl ratio of 4:3. Two girls leave the class, changing the ratio to 10:7. How many students are now in the class?
Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
4x/3x-2=10/7
28x=30x-20
20=2x
x=10
The original amount of students was 40 boys, and 30 girls. Now there are 40 boys and 28 girls..