Question

Pieter wrote the equation 7h – 5(3h – 8) = –72 to model the number of hours it takes to dig a well to a level of 72 feet below sea level. How many hours will it take to dig the well?

Answer 1

I believe the answer is 14 hours.

Answer 2

Answer: It takes 14 hours to level 72 feet below sea level.

Explanation:

Since we have given that

The equation representing the number of hours it takes to dig a well to a level of 72 feet below sea level is given by

`7h-5(3h-8)=-72`

We need to find the number of hours 'h':

`7h-5(3h-8)=-72\\\\7h-15h+40=-72\\\\-8h+40=-72\\\\-8h=-72-40\\\\-8h=-112\\\\h=(112)/(8)\\\\h=14`

Hence, it takes 14 hours to level 72 feet below sea level.