The new phone was discounted by 2800kč. After this discount, 5 phones cost 5530 CZK, more than 3 phones before the discount. How much did the phone cost before the discount?

Correct answer:

x =  9765

Step-by-step explanation:

5•(x-2800) = 3•x + 5530

2x = 19530

x = 9765

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