Question 1185563
Tevin has a change jar that contains only pennies and dimes. He has 60 coins which add up to a total of $3.57. How many of each type of coin does he have?
<pre>Let number of dimes be D
Then number of pennies = 60 - D
We then get: .1D + .01(60 - D) = 3.57
               .1D + .6 - .01D = 3.57
                    .1D - .01D = 3.57 - .6
                          .09D = 2.97
Number of dimes, or {{{highlight_green(matrix(1,7, D, "=", 2.97/.09, "=", 297/9, "=", 33))}}}

You should now be able yo find the number of pennies.

One of the other 3 people who responded makes this problem so COMPLEX and time-consuming when it shouldn't be. No-one wants 
to spend all that time trying to figure out just one problem especially if he/she is in an exam, which is usually timed.</pre>