Mathematics, 26.06.2019 12:30 ashtonrieper2721

There are some students in two examination halls a and b. to make the number of students equal in each hall, 10 students are sent from a to b. but if 20 students are sent from b to a, the number of students in a becomes twice the number of students in b. find the number of the two halls.

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There are some students in two examination halls a and b. to make the number of students equal in ea...