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17 September, 04:17

3 (2x-5) = 21

What is x?

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Answers (2)
  1. 17 September, 06:28
    0
    X=6 is your answer.-.
  2. 17 September, 06:43
    0
    You would solve a problem like this:

    3 (2x-5) = 21

    6x-15=21 ... I multiplied 2x and - 5 by 3

    6x-15=21

    6x-15+15=21+15 ... I added 15 to both sides so 6x can be alone

    6x=36

    6x/6=36/6 ... I divided by 6 from both sides to leave x alone to get the answer:

    x=6.
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