SOLUTION: 45litters alcohol with 15% water to make 10% water how much alochol to be added

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Question 853750: 45litters alcohol with 15% water to make 10% water how much alochol to be added
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
You may mean this:
45 liters of 15% water in alcohol is available, and 10% water in alcohol is wanted. How much alcohol should be added?

The focus is on concentration of water. Ignoring the type of units for the concentration percents, this simple analysis helps form our equation:

Let v = amount of alcohol to add.
Amount of water present will be the same before and after.
Amount of water = 45%2A0.15, as liters.
Amount of resulting solution = 45%2Bv.

highlight%28%2845%2A0.15%29%2F%28v%2B45%29=0.10%29, Decimal fractions being used instead of "percents".

The equation is there, unsolved. You can check its form for understanding, and then solve for v yourself.