Problema Solution
A customer goes to the bank and gets change for a 100.00 dollar bill. The change is to be 1 dollar bills and 5 dollar bills. If there are 28 bills in all, how many are 5.00 dollar bills?
Answer provided by our tutors
If there are x 1 dollar bills, then there are (28 - x) 5 dollar bills.
Total value of the bills = $1 * x + $5 * (28 - x) = $(x + 140 - 5x) = $(140 - 4x)
Now, 140 - 4x = 100
4x = 140 - 100
4x = 40
x = 40/4
x = 10
28 - x = 28 - 10 = 18
So, there are 18 5 dollar bills.