Woodcutters 82406

Fifteen loggers would take 12 days to clear a large field. How many days did this work require, if 5 more woodcutters were transferred to them after 4 days of work?

Correct answer:

x =  10

Step-by-step explanation:

$$\begin{gathered} 15\cdot 12=15\cdot 4+(15+5)\cdot (x-4) \\ 20x=200 \\ x=\frac{200}{20}=10 \\ x=10 \end{gathered}$$

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