Problem
Veronica has a total of 10 bills, all of which are $5 bills and $20 bills. If her $5 bills were $20 bills and her $20 bills were $5, her bills would total $30 more. How many $5 bills does Veronica have?
The response must include a reference list. Using Times New Roman 12 pnt font, double-space, one-inch margins, and APA style of writing and citations.