Product 6352

There was an offer for item B: If you take six pieces, you only pay for four. One piece of this product costs 7 euros. Maria took 31 pieces of this product to her basket. How many euros did she pay for this item?

Correct answer:

x =  147 Eur

Step-by-step explanation:

$$\begin{gathered} a=\lfloor 31/6\rfloor =5 \\ x=7\cdot (a\cdot 4+(31-6\cdot a))=7\cdot (5\cdot 4+(31-6\cdot 5))=147\text{Eur} \end{gathered}$$

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