Final answer:
The normal price of the tablet computer was 98.75 euros before a 20% sale reduction reduced it by 79 euros.
Step-by-step explanation:
The question asks for the normal price of a tablet computer before a sale reduction of 20%. The information given is that the sale reduction amounts to 79 euros. To find the original price, we can set up the following equation: original price − 20% of original price = sale price. Since the reduction amount is 79 euros, we have:
original price − 0.20 × original price = original price - 79 euros.
From this, we can isolate the original price on one side of the equation:
original price × (1 − 0.20) = original price × 0.80 = 79 euros.
Therefore, we can find the original price by dividing 79 euros by 0.80:
original price = 79 euros ÷ 0.80 = 98.75 euros.
Thus, the normal price of the tablet computer was 98.75 euros before the sale.