Question 1171403
.
<pre>

x quarters

20-x dimes


Total money equation

    25x + 10*(20-x) = 335  cents.


It implies

    25x + 200 - 10x = 335

    25x - 10x       = 335 - 300

       15x          = 135

         x          = 135/15 = 9.


<U>ANSWER</U>.  9 quarters and 20-9 = 11 dimes.


<U>CHECK</U>.   9*25 + 11*10 = 335  cents, in total.   ! Correct !
</pre>

Solved.