A wallet contains the same number of one, five and ten dollar bills. The bills total $176. How many of each type of bill does the wallet contain?

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.

You need to do x2-x1,y2-y1 and divide it by 2 and you should get (1,-3)