<PRE><B>Question 738793</B>
T are $20 bills.  F are $50 bills&lt;P&gt;
T + F = 15  Equation 1&lt;P&gt;
20T + 50F = 390 Equation 2&lt;P&gt;
Eq 1: T = 15-F  (plug that into equation 2)&lt;P&gt;
20(15-F) + 50F = 390&lt;P&gt;
300 - 20F + 50F = 390&lt;P&gt;
30F = 90&lt;P&gt;
F = 3&lt;P&gt;
T = 15-F = 15-3 = 12
&lt;P&gt;Hope the solution helped.  Sometimes you need more than a solution.  Contact fcabanski@hotmail.com for online, private tutoring, or personalized problem solving (quick for groups of problems.)
</PRE>