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29 August, 12:15

How many liters (L) of 10% alcohol solution must be mixed with 50 L of 90% solution to get a 50% solution

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  1. 29 August, 16:01
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    0.1x+50 (0.9) = 0.5 (x+50)

    0.1x+45=0.5x+25

    minus 0.1x both sides

    45=0.4x+25

    minus 25 both sides

    20=0.4x

    divide oth sides by 0.4

    50=x

    add 50 liters
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