Advanced MathEasyDistributing a negative and combining
Advanced Math practice question
Which expression is equivalent to −2(3x − 4) + 5x?
- A. −x + 8Correct
- B. −x − 8
- C. 11x − 8
- D. −11x + 8
Answer: A. −x + 8
Distribute −2 over both terms: −6x + 8. Then add 5x: −6x + 5x + 8 = −x + 8.
Why the other answers are wrong
- B. −x − 8
- −2 times −4 is +8, not −8. A negative times a negative is positive.
- C. 11x − 8
- 11x − 8 comes from +6x + 5x − 8 — the −2 was distributed as +2.
- D. −11x + 8
- −11x subtracts 5x instead of adding it, and −6x − 5x is not what the expression says.
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