Answer: 11 of each bill. Explanation: Plug the numbers into an equation to explain the addition. This could be 1x+5x+10x=176, because the wallet contains the same amount of each bill (the x variable). You now have to add like-variables, so add all of the numbers with x. You should now have 16x=176. Now, divide both sides by 16 to isolate the variable, and you’ll get your answer. x= 11. There are 11 of each bill.