Pouring alcohol

100 liters of alcohol has 70%
How many liters of water need to be added to have 60% alcohol?

Correct result:

x =  16.6667

Solution:


100 • 0.70 = 0.6 • (100+x)

0.6x = 10

x = 50/3 ≈ 16.666667

Our simple equation calculator calculates it.



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