codyroach codyroach

05-01-2017
Mathematics

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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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apologiabiology apologiabiology

05-01-2017

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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