Mixture 2

How many liters of water must be added to 7 liters of a 20% solution to obtain a 10% solution?

Correct answer:

x =  7

Step-by-step explanation:


20/100 · 7 = 10/100 · (x+7)

10x = 70


x = 70/10 = 7

x = 7

Our simple equation calculator calculates it.



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