Q:

A description of what Derek did wrong and what he should have done instead the correct solution graphed on a number line

Accepted Solution

A:
Answer:Derek did it wrong that he did not change the inequality sign while dividing both side terms of the inequality by - 3.Step-by-step explanation:We are going to solve an equation of inequality of single variable x. We will start with, -3x + 5 > 20 β‡’ -3x + 5 - 5 > 20 - 5 β‡’ - 3x > 15 β‡’ [tex]\frac{-3x}{-3} < \frac{15}{-3}[/tex] β‡’ x < - 5 Therefore, while dividing both side terms by -3, the inequality sign will change from > to < sign. So, Derek did it wrong that he did not change the inequality sign while dividing both side terms of the inequality by a negative number. (Answer)