Question 177738
{{{C(x)=1.5x/(100-x)}}} Start with the given function.



{{{0=1.5x/(100-x)}}} Plug in {{{C(x)=0}}}



{{{0(100-x)=1.5x}}} Multiply both sides by {{{100-x}}}



{{{0=1.5x}}} Multiply and simplify. So what really counts is the numerator.



{{{0/1.5=x}}} Divide both sides by 1.5



{{{0=x}}} Divide



So the answer is {{{x=0}}}