Question 892876
m = price for Mangos, in unit of dollars per mango
d = price for durians, dollars per durian
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6*m=2*d, description of costs
simplified to {{{3*m=d}}}



PURCHASE


{{{3*m+4*d=30}}}


{{{3m+4(3m)=30}}}
{{{3m+12m=30}}}
{{{15m=30}}}
{{{m=30/15}}}
{{{highlight(m=2)}}}--------------This is $2 per Mango.