SOLUTION: I need 90 milliliters of a 20% solution but only have 4% and 40% solutions available. how many many milliliters of each should be mixed to get my desired solution?

Algebra ->  Customizable Word Problem Solvers  -> Mixtures -> SOLUTION: I need 90 milliliters of a 20% solution but only have 4% and 40% solutions available. how many many milliliters of each should be mixed to get my desired solution?      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 909956: I need 90 milliliters of a 20% solution but only have 4% and 40% solutions available. how many many milliliters of each should be mixed to get my desired solution?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
x 40% amount
.40x + .04(90ml - x) = .20(90ml)
x = .16(90ml)/.36, 40% amount
90-x the 4% amount