SOLUTION: Dory has a solution that is 65% boric acid and a solution that is 15% boric acid. How much of each should she use to obtain 300 ml of a solution that is 35% boric acid?

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Question 203401This question is from textbook
: Dory has a solution that is 65% boric acid and a solution that is 15% boric acid. How much of each should she use to obtain 300 ml of a solution that is 35% boric acid? This question is from textbook

Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
let x=65% solution
let x-300=15% solution
0.65x+0.15(300-x)=0.35(300)
0.65x+45-0.15x=105
0.50x=60
x=120 ml of 65%
x-300=180 ml of 15%