Advanced Math practice question

Answer: A. 6x − 15

5(2x − 3) = 10x − 15. Then 10x − 15 − 4x = 6x − 15.

Why the other answers are wrong

B. 6x − 3

6x − 3 forgets to multiply the −3 by 5.

C. 14x − 15

14x − 15 adds 4x instead of subtracting it.

D. 6x + 15

5 × (−3) is −15, not +15.

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