A jar has $5.25 in quarters and dimes. There is 7 more quarters then dimes. How many dimes are in the jar?

Question

Jackie has a jar with dimes and quarters.  She has 7 more quarters then she has dimes.  Total value in jar is $5.25. How may  quarters does she have?

What is the equation to solve this problem?

Answer 1

You state that There is 7 more quarters then dimes.

I rewrite this as There are 7 more quarters than dimes.

 

Let d = # of dimes; then # of quarters must be d+7.  Write this value equation"

10d +25(d+7) = 525 (in cents).  Solve for d.