Performance 31371

According to the plan, seven pavers were to pave the square in 14 days. After two days of work, another 5 pavers came to help them. How many days from the arrival of the pavers will the work be completed? (tile performance is the same)

Correct answer:

t =  9

Step-by-step explanation:

7·14 = 2·7+(t-2)·(7+5)

12t = 108

t = 108/12 = 9

t = 9

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