Question 1158389

Andria has $16 worth of quarters and dimes.  If Andria has 2 1/2 times as many dimes as she does quarters, how many quarters does she have?
<pre>Are you confused yet by what the other person did? If so, read on!
Let the number of quarters be Q
Then number of dimes = 2.5Q
We then get: .1D + .25Q = 16
.1(2.5Q) + .25Q = 16 ----- Substituting 2.5Q for D
Continue to solve for Q, the number of quarters, and you should get {{{highlight_green(matrix(1,3, 32, of, them))}}}