AlgebraEasy–MediumTesting values against an inequality
Algebra practice question
For which of the following values of x is 3x − 4 greater than 8?
- A. 5Correct
- B. 4
- C. 3
- D. 0
Answer: A. 5
3x − 4 > 8 means 3x > 12, so x > 4. Of the choices, only 5 is greater than 4. Check: 15 − 4 = 11 > 8.
Why the other answers are wrong
- B. 4
- 3(4) − 4 = 8, which equals 8 but is not GREATER than 8.
- C. 3
- 3(3) − 4 = 5, less than 8.
- D. 0
- 3(0) − 4 = −4, less than 8.
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