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7 September, 05:45

5x-9y-42=? (x+6) - 9 (y+?)

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Answers (2)
  1. 7 September, 07:05
    0
    5x-9y-42=5 (x+6) - 9 (y+8)

    Step-by-step explanation:

    given 5x-9y-42=5x-9y-72+30

    =5x+30-9y-72

    =5 (x+6) - 9 (y+8)

    hence 5x-9y-42=5 (x+6) - 9 (y+8)
  2. 7 September, 07:58
    0
    5 8

    Step-by-step explanation:

    Coefficient of x should be 5 so first? should be 5 let the second? = z

    5*6-9*z=-42

    30+42=9z

    z=8
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