Goods exchange payment

The customer paid 143 euros for the goods after a 20% discount. But he wants to exchange all goods for goods in the total amount of 233e. She still has a 20% discount on this amount. How many euros does the customer have to pay for the returned goods?

Final Answer:

x =  43.4 Eur

Step-by-step explanation:

$$\begin{gathered} s=20\%=\frac{20}{100}=\frac{1}{5}=0.2 \\ q=1-s=1-0.2=\frac{4}{5}=0.8 \\ x=233\cdot q-143=233\cdot 0.8-143=43.4\text{Eur} \end{gathered}$$

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