Using q for quarters and n for nickels, and using 525 cents as $5.25, we're given two equations:

- q = 4n
- 0.25q + 0.05n = 5.25

0.25(4n) + 0.05n = 5.25

Multiply through and simplify:

n + 0.05n = 5.25

To solve this equation for n, we type it in our search engine and we get:

n =

**5**

To get q, we plug in n = 5 into equation (1) above:

q = 4(5)

q =

**20**