Word problem

[GypsySkies]

I can't figure out how to set up the following problem. We are doing System Of Linear Equations in two Variables.

Suzanne has a new collection of quarters and $1 coins. She has four more quarters then dollar dollar coins and the total value is $4.75, How many of each coin does Suzanne have?

The answers is seven quarters and three dollars, but I can't figure out how to get it like that.

 

[arthur ohlsten]

let Q be the number of quarters
let D be the number of dollars

.25 Q + D=$4.75
Q=D+4

 

[GypsySkies]

Thank you so much! You have no idea how much of an issue this problem was!