Question 1208882
{{{f}}}{{{"="}}}{{{number}}}{{{of}}}{{{friends}}}{{{who}}}{{{ordered}}}{{{fish}}}
{{{n}}}{{{"="}}}{{{number}}}{{{of}}}{{{friends}}}{{{who}}}{{{ordered}}}{{{noodles}}}
 
{{{system(f+n=5,5f+2.5n=17.5)}}} --> {{{system(n=5-f,10f+5n=35)}}} --> {{{system(n=5-f,10f+5(5-f)=35)}}} --> {{{system(n=5-f,10f+25-5f=35)}}} --> {{{system(n=5-f,10f-5f=35-25)}}} --> {{{system(n=5-f,5f=10)}}} --> {{{system(n=5-f,f=2)}}} --> {{{system(n=5-2,f=2)}}} --> {{{highlight(system(n=3,f=2))}}}