Question

2) Thomas wants to find the difference
1/2 (6x – 2) – (2x + 1)

He does the following:

1/2 (6x – 2) – (2x + 1)
3x – 1 – x + 1/2 =
3x + x – 1 + 1/2 =
4x – 1/2

Is this correct? If not, show the correct procedure and explain where Thomas made his mistake.​

Answers

  1. Answer:
    Thomas is not correct, x-2 is the correct answer
    Step-by-step explanation:
    Thomas made his mistake by multiplying the 1/2 by both (6x-2) and -(2x+1). Thomas should have multiplied the 1/2 by just the (6x-2).
    Correct procedure:
    1/2 (6x-2)-(2x+1)
    (3x-1)-(2x+1)
    3x-1-2x-1
    x-2

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