Tony has $87. He needs to buy some cheese, which costs $7 a pound and a pound of beef that costs $5 a pound. After buying the beef and his cheese, he has $61 left. How many pounds of cheese did he buy?
He spent $26 because 87 - 61 = <<87-61=26>>26
He spend $21 on cheese because 26 -5 = <<26-5=21>>21
He bought 3 pounds of cheese because 21 / 7 = <<21/7=3>>3
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