# Concentration

How 0.5 liters of 8% vinegar diluted to a concentration of 20 hundredths % of vinegar? How many liters of water must be pour?

Correct result:

x =  19.5 l

#### Solution:

0.5 • 8% = 20/100 % • ( x + 0.5)

20x = 390

x = 392 = 19.5

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