Question
There were some rows of desks in a tuckshop. Each row had 10 desks. When Pamela brought in 8 extra desks and rearranged all the desks, there were 6 desks in each row and 4 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 tuckshop. Each row had 10 desks. When Pamela brought in 8 extra desks and rearranged all the desks, there were 6 desks in each row and 4 more rows than before. How many desks were there at first?