Question 709532
c = ounces of original cake.


{{{c-(3/5)c-(1/4)c=24}}}
{{{c(1-3/5-1/4)=24}}}
{{{(20/20-12/20-5/20)c=24}}}   [because LCD is 20]
{{{(3/20)c=24}}}
{{{c=(24/3)20}}}
{{{c=8*20}}}
c=160 ounces