Question 1092935
x for the cheaper $1.27 per pound candy
y for the $1.77 per pound candy


Account for the mixture mass:
{{{x+y=13}}}


Account for the mixture COST:
{{{1.27x+1.77y=19.0}}}




More than one way to go from there.  One of them is like this:
{{{y=13-x}}}
-
{{{1.27x+1.77(13-x)=19}}}
{{{1.27x+23.01-1.77x=19}}}
{{{-0.5x=19-23.01}}}
{{{x=2(23.01-19)}}}
{{{x=8.02}}}, {{{y=4.98}}}


(NOTE:  Misread problem; not saw the wrapped "1" at the end, on the page for the $19.01)