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.

Step-by-step 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':

$7h-5(3h-8)=-72\\\\7h-15h+40=-72\\\\-8h+40=-72\\\\-8h=-72-40\\\\-8h=-112\\\\h=\dfrac{112}{8}\\\\h=14$

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