Question
There were some boys and girls in a classroom. 8 boys left and now, there are thrice as many boys as girls in the classroom. If there are only 4 girls, how many boys were in the classroom at first?
4 m

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There were some boys and girls in a classroom. 8 boys left and now, there are thrice as many boys as girls in the classroom. If there are only 4 girls, how many boys were in the classroom at first?