Question

van thinks that the answer to -3x < 12 is x < -4. how will you convince him that his answer is incorrect?

Answer 1

When rearranging an inequality, it is the same as rearranging an equation. However, if you divide or multiple by a negative number, the inequality sign flips. To simply this equation, you have to divide both sides by -3, which will make the inequality sign flip. Therefore, the answer is actually:
x>-4