SOLUTION: A storage tank contains 150 liters of fuel which is 3% oil (and 97% gasoline). How many liters of oil should be added for use in an engine that requires a 15% oil mixture

Question 1178300: A storage tank contains 150 liters of fuel which is 3% oil (and 97% gasoline). How many liters of oil should be added for use in an engine that requires a 15% oil mixture
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
A storage tank contains 150 liters of fuel which is 3% oil (and 97% gasoline).
How many liters of oil should be added for use in an engine that requires a 15% oil mixture
:
let x = amt of oil in liters required
:
.03(150) + x = .15(x+150)
4.5 + x = .15x + 22.5
x - .15x = 22.5 - 4.5
.85x = 18
x = 18/.85
x = 21.176 liters of oil needed
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