SOLUTION: Chemist mixes 200 ml of solution that is 15% salt with 300 ml that is 40% salt. What percent salt is resulting solution?

Question 602315: Chemist mixes 200 ml of solution that is 15% salt with 300 ml that is 40% salt. What percent salt is resulting solution?
Answer by nerdybill(7384) (Show Source): You can put this solution on YOUR website!
Chemist mixes 200 ml of solution that is 15% salt with 300 ml that is 40% salt. What percent salt is resulting solution?
Let x = percent salt of resulting solution
then
.15(200) + .40(300) = x(200+300)
30 + 120 = x(500)
150 = x(500)
150/500 = x
0.30 = x
or
30% = x

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