How many liters each of a 45% acid solution and a 75% acid solution must be used to produce 40 liters of a 60% acid solution? (Round to two decimal places if necessary.)

Answer 1

.75x + .45(40-x) = .6(40).75(24) + .45(16) =

.75x -.45x = (.6-.45)(40

.3x = .15(40)

x = 6/.3 = 20 liters of 75% solution

40-24 = 20 liters of 45% solution

.75(20)+.45(20) = 15+9=24=.6(40)

75 is within 15 of 60

45 is within 15 of 60

they're an equal distance from 60

so you need an equal amount of each