Question 125655
Let {{{m}}} = pounds of mocha
Let {{{d}}} = pounds of decaf
{{{8.5m + 8d = 87.5}}}
{{{m = 2d}}}
{{{8.5(2d) + 8d = 87.5}}}
{{{25d = 87.5}}}
{{{d = 3.5}}}
{{{m = 2d}}}
{{{m = 7}}}
She can buy 3.5 lb of Mocha and 7 lb of decaf
check:
{{{8.5m + 8d = 87.5}}}
{{{8.5*7 + 8*3.5 = 87.5}}}
{{{59.5 + 28 = 87.5}}}
{{{87.5 = 87.5}}}
OK