Judy is given some money to buy files. If she buys 5 files, she will have $4 left. If she buys 9 files, she will need another $5. How much money does she have?
If a file costs x dollars,
5x+4 = 9x-5
4x = 9
x = 2.25
So, she has $15.25
5x+4 = 9x-5
4x = 9
x = 2.25
So, she has $15.25