Question

Given: -7x < -21. Choose the solution set. x x x < 3 x

Answer 1

x > 3 is what you answer should look like

Answer 2

First, simplify the inequality by getting the x term with a coefficient of 1.

Divide both sides by -7. When you multiply or divide an equality by a negative number, you flip the inequality sign the opposite way.

-7x / -7 < -21 / -7
x > 3

In set build notation is would look like this: x

Which would be read as "the set of all x, such that, x is greater than 3".