Question 741639
p = amount, grams of coffee at 75 peso per 100 grams to use.

(Total Cost) / (total grams) = (target pesos) / (target grams)


{{{(p*(75/100)+250*(250/250))/(p+250)=80/100}}}


{{{(0.75p+250)/(p+250)=0.80}}}


{{{0.75p+250=0.80(p+250)}}}
{{{0.75p+250=0.80p+0.80*250}}}
{{{0.75p+250=0.80p+200}}}
{{{50=0.05p}}}
{{{p=50/(0.05)}}}
{{{p=1000__grams}}}