Question
There were 210 students at a hall at first. After 47 of the girls and 12 of the boys left, there were still 40 more boys than girls at the hall. How many boys were there in the end?
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There were 210 students at a hall at first. After 47 of the girls and 12 of the boys left, there were still 40 more boys than girls at the hall. How many boys were there in the end?