Question 589635
Hello:)
You will need to set up two equations for the linear system and solve the variables.

Let d be the number of dimes and q be the number of quarters
The total value is $5.6: 0.1d + 0.25q = 5.6
The jar has 7 more quarters in it than it has dimes: q = d + 7

So we have two equations:
0.1d + 0.25q = 5.6
q = d + 7

Solve the system, you will find the number of quarter and dimes in the jar.

Hope it helps you!
John10:)