Pharmacy

The pharmacy add to 3 liters of 95-percent alcohol 5 liters of 38.04 percent alcohol. How many percent pharmacy got?

Correct result:

p =  59.4063 %

Solution:


3•0.95+5•0.3805 = p/100 •(3+5)

8p = 475.25

p = 1901/32 = 59.40625

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