Question 887480
h for how many hours worked.
 
"D" is unit of "dollars"



{{{9(D/hour)*h*hour-5*D=40*D}}}
without showing units,
{{{9h-5=40}}}
{{{9h=40+5}}}
{{{9h=45}}}
{{{h=45/9}}}
{{{highlight(h=5)}}}