Question

A math test asls the students to solve the inequality x-5_>14 and then graph the solutions as shown below. Solve the inequality and graph the solutions. What error might Mason have made?

Answer 1

Inequality

x-5 ≥ 14

Then isolate x, at left

x ≥ 14 + 5

x≥ 19

Mason find this solution x≥ 9

Its wrong because Mason did not change sign of -5, to +5

So he calculated x ≥ 14 -5 ,

and obtained. x ≥ 9