Question:
Some chairs were arranged in rows in a hall. There were 8 chairs in each row. 4 chairs were added and when all the chairs were rearranged, there were 6 chairs in each row and 3 more rows than before in the hall.
(a) How many chairs were there in the hall at first?
(b) How many more chairs must be added so that there are 12 rows of 7 chairs in the hall?
Solution:
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