# Socks

One pair of socks worth CZK 27. Set of 3 pairs of these socks are sold with 10% discount. How many we will pay CZK for two offered sets of socks?

Result

x =  145.8 Kc

#### Solution:

$p=27 \ \\ s=3 \cdot \ p \cdot \ (1-10/100)=3 \cdot \ 27 \cdot \ (1-10/100)=\dfrac{ 729 }{ 10 }=72.9 \ \\ x=2 \cdot \ s=2 \cdot \ 72.9=\dfrac{ 729 }{ 5 }=145.8 \ \text{Kc}$

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