Question

Eduro solved -4x > 120 by adding 4 to each side lf the inequality what mistake did he make?

Answer 1

Eduro's mistake of solving the inequality -4x > 120 is adding 4 to both sides instead of dividing both sides by -4

Inequality

minus four x greater than 120

-4x > 120

• divide both sides by -4

x < 120/-4

There is a change in the inequality sign from greater than to less than because the inequality is been divided by -4

x < -30

Check:

-4x > 120

-4(-30) > 120

120 > 120

Therefore, Eduro's mistake of solving the inequality -4x > 120 is adding 4 to both sides instead of dividing both sides by -4

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