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12 June, 09:56

Simplify: - 3 (x - 5) - 8 (y + 2) + (-3) (6 - 4b) A. - 3x - 8y - 12b - 15 B. - 3x - 8y + 12b + 15 C. - 3x - 8y + 12b + 20 D. - 3x - 8y + 12b - 19

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  1. 12 June, 10:05
    0
    Distribute

    a (b+c) = ab+ac so

    -3 (x-5) = - 3x+15

    -8 (y+2) + - 8y-16

    -3 (6-4b) = - 18+12b

    add them together

    -3x+15-8y-16-18+12b

    associative property

    15-16-18-3x-8y+12b

    add

    -19-3x-8y+12b is the answer which is D
  2. 12 June, 10:07
    0
    Expand the expressions:

    -3x+15-8y-16-18+12b

    Combine like terms:

    -3x-8y+12b-19

    Now, we have fully simplified this expression. D is the correct answer.
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