Question 1064367
{{{system(L=-5+2w,wL=85.9)}}}


{{{w(2w-5)=85.9}}}


{{{2w^2-5w-85.9=0}}}


{{{w=(5+- sqrt(25+4*2*85.9))/(2*2)}}}


{{{w=(5+- sqrt(96.2))/4}}}


{{{highlight(w=(5+sqrt(96.2))/4)}}}
Simplify further and use it for finding L.