Betty has 10 more dimes than quarters. If she has $3.45, how many coins does she have?

Question

There are no additional details this is it. 

Answer 1

Let number of quarters be q

Number of dimes = q +10

 

Total worth = $ .25q + (q+10)*.1  = .35q + 1 = $3.45

 

q = (3.45 - 1) /.35 = 2.45 /.35 = 7

 

So she has 7quarters and 17 dimes.