Question

Mr. Borkowski ordered 3 boxes of pens for the supply room. There are 12 pens in each box. If there are now a total of 96 pens in the supply room, including the ones Mr.Borkowski added, how many boxes of pens were already in there before his order arrived?

Answer 1

11 boxes

Explanation:

multiply 3 by 12 then add the product of that to 96 pens then divide the sum which is 132 by 12 and you should get 11.