Asked by Anonymous

According to Mrs. Cooper's class survey, 4 out of 7 students own a pool. The difference between the number of students that own a pool and those who don't is 7. How many students participated in the survey?
Answered by oobleck
If x students own a pool, then
(x+7)/x = 4/3
find x, and then x+(x+7)
Answered by oobleck
sorry. I meant

If x students do not own a pool, then ...
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