Question 1081210
.
<pre>
Let "x" be the number of 10-cent coins.
Then the number of 5-cent coins is x also, and the number of 20-cent coins is (19-2x).


The "value" equation is

5x + 10x + 20*(19-2x) = 220  cents,

15x + 380 - 40x = 220,

-25x = 220-380  --->  -25x = -160  --->  x = {{{(-160)/(-25)}}} = there is no integer solution.


===>  the problem formulation is incorrect OR the problem has no solution.


In any case, I regret about my time I spent for nothing solving it.
</pre>

May be, the only sense is that other tutors will save their time after reading my answer.