UPCAT Mathematics practice question 32: Solve the inequality: 3x − 4 < 11
Correct answer
D. x < 5
Add 4 to get 3x < 15, then divide by the positive 3 to get x < 5. The direction of the inequality is unchanged.
The question
Solve the inequality: 3x − 4 < 11
- Option A: x > 5
- Option B: x < 3
- Option C: x > −5
- Option D: x < 5Correct
Why D is correct
Add 4 to get 3x < 15, then divide by the positive 3 to get x < 5. The direction of the inequality is unchanged.