Pieter wrote and solved an equation that models the number of hours it takes to dig a well to a level of 72 feet below sea level
. 7h – 5(3h – 8) = –72
Which statement is true about Pieter’s solution?
It cannot be a fraction or decimal because the depth of the well is a whole number.
It must be a positive number since it represents a number of hours.
It must be a negative number because the depth is below sea level.
It cannot be greater than –72 because that is the depth of the well.
To find the value of , we need to isolate it on one side of the equation. Add to both sides of the equation, then multiply both sides of the equation by .
