Question 885835
Comparison of cost to mass would be the same.


Let x = how many kilograms may be bought


{{{highlight(r/1=500/x)}}}.
r is an unknown constant. x is an unknown variable to be solved.


{{{(r/1)x=(500/x)x}}}
{{{rx/1=500}}}
{{{(rx/1)/r=500/r}}}
{{{highlight(x=r/500)}}}.