SOLUTION: How much pure alcohal should be added to 400 ml of 15% strength to make its strength 32%?

Algebra ->  Percentages: Solvers, Trainers, Word Problems and pie charts -> SOLUTION: How much pure alcohal should be added to 400 ml of 15% strength to make its strength 32%?      Log On


   

Question 364431: How much pure alcohal should be added to 400 ml of 15% strength to make its strength 32%?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Pure alcohol is 100% strength.
Let X be the amount of pure alcohol added.
100X%2B15%28400%29=32%28X%2B400%29
100X%2B6000=32X%2B12800
68X=6800
highlight%28X=100%29ml