AlgebraEasySolving a one-step-and-divide inequality
Algebra practice question
Which of the following describes all solutions of 3x + 5 < 20?
- A. x < 5Correct
- B. x > 5
- C. x < 15
- D. x ≤ 5
Answer: A. x < 5
Subtract 5, then divide by 3: 3x < 15, so x < 5.
Why the other answers are wrong
- B. x > 5
- Dividing by the positive number 3 does not flip the inequality.
- C. x < 15
- 15 is 3x's bound; divide by 3 for x < 5.
- D. x ≤ 5
- The strict < stays strict; x = 5 gives 20, which is not less than 20.
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