SOLUTION: An 18l solution is 32% oil. How much water must be added to produce a solution that is 19% oil?

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Question 679474: An 18l solution is 32% oil. How much water must be added to produce a solution that is 19% oil?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
An 18l solution is 32% oil. How much water must be added to produce a solution that is 19% oil?
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Equation:
water + water = water
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0.68*181 + 1.00x = 0.81(181+x)
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Multiply thru by 100 to get:
68*181 + 100x = 81*181 + 81x
19x = 13*181
x = 123.84 units (amt. of water to add)
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Cheers,
Stan H.