Question 97741
(4(20) + 8(x))/(20 + x) = 5
80 + 8x = (20 + x)5
80 + 8x = 100 + 5x
3x = 20
x = 20/3 pounds of 8$ per pound
20 + 20/3 = 60/3 + 20/3 = 80/3 pounds in all