Question
There were 3 times as many boys as girls in the school hall at first. After 8 boys left and 7 girls entered the school hall, there were 5 more boys than girls remaining in the school hall. What was the number of boys in the school hall at first?
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There were 3 times as many boys as girls in the school hall at first. After 8 boys left and 7 girls entered the school hall, there were 5 more boys than girls remaining in the school hall. What was the number of boys in the school hall at first?