Question 894546
{{{n+d+q=25}}}, {{{d/q=3}}},  {{{0.05n+0.10d+0.25q=2.05}}}.


Adjust the ratio equation into {{{d=3q}}}.


Multiply the money account equation by 20:
{{{n+2d+5q=41}}}.


Interesting you are asked for the number of dimes, d.  You have this system of equations:
{{{highlight_green(system(n+d+q=25,d=3q,n+2d+5q=41))}}}.


Do you know what to do to solve this system?