SOLUTION: How many liters of each of 15% and 40% solutions of alcohol should be mixed to produce 5 liters of 20% solution?

Algebra ->  Customizable Word Problem Solvers  -> Mixtures -> SOLUTION: How many liters of each of 15% and 40% solutions of alcohol should be mixed to produce 5 liters of 20% solution?      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 1111038: How many liters of each of 15% and 40% solutions of alcohol should be mixed to produce 5 liters of 20% solution?
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
x of 15%
y of 40%

15x%2B40y=20%2A5
3x%2B8y=20
-
x%2By=5
-
system system%283x%2B8y=20%2Cx%2By=5%29

Use Elimination at least for one of the variables.

system%28x=4%2Cy=1%29