SOLUTION: Joseph mixes a certain amount of 10% isopropyl mixture with 60 gallons of a 20% isopropyl solution, and the resulting mixture is 16% isopropyl. How much of the 10% isopropyl did h

Question 202476: Joseph mixes a certain amount of 10% isopropyl mixture with 60 gallons of a 20% isopropyl solution, and the resulting mixture is 16% isopropyl. How much of the 10% isopropyl did he add? To earn credit, you MUST construct an algebraic equation with a variable and solve using algebra steps.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Joseph mixes a certain amount of 10% isopropyl mixture with 60 gallons of a 20% isopropyl solution, and the resulting mixture is 16% isopropyl. How much of the 10% isopropyl did he add? To earn credit, you MUST construct an algebraic equation with a variable and solve using algebra steps.
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Equation:
iso + iso = iso
0.10x + 0.20(60) = 0.16(x+60)
10x + 1200 = 16x + 960
6x = 240
x = 40 gallons (amt. of 10% iso needed for the mixture
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Cheers,
Stan H.
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