Question 1197204
{{{system(9w+3c+5r=40.9,3w+5c+9r=47.3,5w+9c+3r=46.1)}}}


Look at the system carefully.
If you add corresponding terms, then you get  {{{17w+17c+17r=134.3}}}, or same as {{{w+c+r=7.9}}}; which could make solving the system to be easier.