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The TV went down 10% and then 10% off the original price again. Now it costs 300 €. What was its original price?

Correct result:

x =  370.37 Eur

Solution:

$\ \\ x \cdot \ (1-10/100) \cdot \ (1-10/100)=300 \ \\ \ \\ 81x=30000 \ \\ \ \\ x=\dfrac{ 10000 }{ 27 } \doteq 370.37037=370.37 \ \text{Eur}$

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