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18 November, 19:23

How many gallons of a 20% ammonia solution should be mixed with 50 gallons of a 50% ammonia solution to make a 30% ammonia solution

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  1. 18 November, 23:03
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    We have 50 gallons of 50% ammonia, to which we will add 20% ammonia until we have a 30% ammonia solution.

    50 *.50 +.20x =.30 * (50 + x) where x is gallons of 20% ammonia.

    25 +.20x = 15 +.30x

    10 =.10 x

    x = 100 gallons of 30% ammonia.
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