Question 1158483
I have 30 coins consisting of 20c coins a 5c coins and my total is $3.45 how
many 20c and 5c coins do I have?
<pre>
Let n = the number of 20c coins,
then the number of 5c coins are 30-n.

Then the total money is 20n + 5(30-n).

That must equal 345c

20n + 5(30-n) = 345

Solve that for n.  That will be the number of 20c coins.

Then subtract from 30 to find the number of 20c coins

Edwin</pre>