A cash register contains only five dollar and fifty dollar bills. It contains four times as many five dollar bills as fifty dollar bills and the total amount of money in the cash register is $2,870. How many fifty dollar bills are in the cash register?

Answer 1

If there are x at $5 and y at $50, then we are told that

x = 4y
5x+50y = 2870

So, now just solve for y.

Answer 2

41