Question
There were some rows of desks in a canteen. Each row had 12 desks. When Sabrina brought in 4 extra desks and rearranged all the desks, there were 4 desks in each row and 5 more rows than before. How many desks were there at first?
4 m

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There were some rows of desks in a canteen. Each row had 12 desks. When Sabrina brought in 4 extra desks and rearranged all the desks, there were 4 desks in each row and 5 more rows than before. How many desks were there at first?