Question 26222
Let amount of 40 cent coffee be "x"
The amount of 80 cent coffee is (2/3)x
And amount of 100 cent coffee is (110-x-(2/3)x)=(110-(5/3)x)
Value of 40 cent coffee is 40x
Value of 80 cent coffee is 80(2/3)x
Value of 100cent coffee is 100(110-(5/3)x)
EQUATION:
Value of 40 + Value of 80 + Value of 100=60(110)cents
   40x+80(2/3)x+100(110-(5/3)x)=60(110) cents
   2x+4(2/3)x+5(110x)-(5/3))x=3(110) cents
   6x+8x+1650-25x=990
             -11x=-660
                x=60 lbs. of 40cent coffee
            (2/3)x=40 lb. of 80cent coffee
          110-(5/3)x=110-(5/3)(60)=10 lbs. of $1.00 coffee
Cheers,
Stan H.