Question
There were 3 times as many boys as girls in the canteen at first. After 6 boys left and 5 girls entered the canteen, there were 9 more boys than girls remaining in the canteen. What was the number of boys in the canteen at first?
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There were 3 times as many boys as girls in the canteen at first. After 6 boys left and 5 girls entered the canteen, there were 9 more boys than girls remaining in the canteen. What was the number of boys in the canteen at first?