Dilbert needs to mix a 40% fungicide solution with a 60% fungicide solution to create 200 millileters of a 45% solution. How many millileters of each solution must Dilbert use?

Answer 1

.6x + .4(200-x) = .45(200)

.6x -.4x = .45(200) -.4(200)

.2x = .05(200)

x = 5(.05)(200)

x= .25(200) = 50 ml of 60% mixed with 150 mL of 40%

yield 200 mL of 45%

60 is within 15 of 45

40 is within 5 of 45

you need 15/5 = 3 times as much 40% as 60%

150/50 = 3