Let x represent the number of pounds of $10.75/lb coffee used in the mix. .. 10.75x +3.25(100 -x) = 5.65*100 . . . . . . total cost of coffee blend .. x(10.75 -3.25) = 100*(5.65 -3.25) . . . . . .separate x-terms from non-x terms .. x = 240/7.5 = 32
32 pounds of $10.75/lb coffee should be used 68 pounds of $3.25/lb coffee should be used
