Question 1046005
Variables, n,d,q


Account for the coins:  n+d+q=24



Account for the money:  0.05n+0.1d+0.25q=3.4



Transcribe the other coin count descriptions:
{{{system(q/n=2,n=d/3)}}}



Understand, you SHOULD need only three equations because you have only three unknown variables.  Currently you have four equations.


To move things along, your system of equations is this:
{{{system(n+d+q=24,n+2d+5q=68,q=2n,d=3n)}}}
Solve the system.  In case any inconsistencies, recheck the problem description and your work.