# Alcohol

6l 48% alcohol, how much 52% alcohol must be added to give 50% alcohol?

Correct result:

x =  6 l

#### Solution:

$\ \\ 6 \cdot \ 0.48 + x \cdot \ 0.52=0.50 \cdot \ (x+6) \ \\ \ \\ 0.02x=0.12 \ \\ \ \\ x=6 \ \text{l}$

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