<PRE><B>Question 511334</B>
How many gallons of water must be added to 40 gallons of 10% alcohol solution to produce an 8% alcohol solution?
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Equation:
water + water = water
x + 0.90*40 = 0.92(x+40)
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Multiply thru by 100 to get:
100x + 90*40 = 92x + 92*40
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8x = 2*40
x = 10 gallons (amt. of water to add)
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cheers,
stan H.
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