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7 November, 06:35

Whats the value of z

2 (5-2z) = 20-2 (z-1)

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Answers (1)
  1. 7 November, 10:09
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    Answer: z=-6

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    .

    2 (5-2z) = 20-2 (z-1)

    10-4z=20-2z+2

    ... - 4 ... - 4

    10=2z+22

    -22 ... - 22

    2z=-12

    :2 : 2

    z=-6
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