# SOLUTION: A chemist obtain 18 grams of 10% saline solution from a mixture of 5% saline solution and a 15% saline solution. How much of the 15% saline solution is used in the mixture?

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 Question 266418: A chemist obtain 18 grams of 10% saline solution from a mixture of 5% saline solution and a 15% saline solution. How much of the 15% saline solution is used in the mixture? Answer by checkley77(12569)   (Show Source): You can put this solution on YOUR website!.15X+.05(18-X)=.10*18 .15X+.9-.05X=1.8 .10X=1.8-.9 .10X=.9 X=.9/.10 X=9 GRAMS OF 15% SOLTION IS USED. PROOF: .15*9+.05(18-9)=.10*18 1.35+.05*9=1.8 1.35+.45=1.8 1.8=1.8