Question 948773
<b>NOTE: Fixed Mistake!</b>


First examine the description and formulate a system of equations.
Assigning n, d, q, for the coin counts of the expected coins,
this is the first way you may form a system of equations:


{{{system(0.05n+0.1d+0.25q=9.60,d-n=5,q/n=2)}}}


Simplify that system, including dividing the money count equation members by 0.05.


You could obtain this equivalent system:

{{{system(n+2d+5q=192,-n+d=5,2n=q)}}}
a much simpler system.


Think carefully about this simplified system to plan a strategy.  The latter two equations each
have two variables and both contain n.  Solve the second equation for d in terms of n,
and solve the third equation for q in terms of n.  Now substitute these for d and q in the simplified
money count equation.  You will be able to solve for the value of n.


The rest should be clear what to do.

(Fixed mistake)