Question 931941
Extremely common exercise.



A rectangle is m times longer than it is wide.  Its area is A.  What is length L and width w?


{{{system(L=mw, A=wL)}}}


That gives {{{w*mw=A}}}
{{{w^2*m=A}}}
{{{m*w^2=A}}}
{{{w^2=A/m}}}
{{{highlight(w=sqrt(A/m))}}}