Advanced MathEasyPencils kept after giving some away
Advanced Math practice question
Ola buys 3 packs of pencils, each holding x pencils, and then gives away 5 pencils. Which expression gives the number of pencils she keeps?
- A. 3x − 5Correct
- B. 3x + 5
- C. 3(x − 5)
- D. x − 15
Answer: A. 3x − 5
Three packs make 3x; giving away 5 leaves 3x − 5.
Why the other answers are wrong
- B. 3x + 5
- Adds the 5 instead of subtracting.
- C. 3(x − 5)
- Subtracts 5 from every pack.
- D. x − 15
- Subtracts 15 from a single pack.
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