Question 1084903
{{{system(f=s+30,f-1=4(s-1))}}}


{{{(s+30)-1=4(s-1)}}}
{{{s+29=4s-4}}}
{{{29+4=3s}}}
{{{3s=33}}}
{{{highlight(s=11)}}}
-
{{{highlight(f=41)}}}