The excavation was carried out in 4 days, and five workers worked on it for 7 hours daily. Determine how long it would take to excavate if seven workers worked on it 8 hours a day.

Correct answer:

x =  2.5

Step-by-step explanation:

4·5·7 = 7·8·x

56x = 140

x = 140/56 = 2.5

x = 5/2 = 2.5

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-6+ -13+1+8+ -3+ -3+ -13+ -6

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