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28 September, 08:00

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Solve porportion

3B/5B-7=8/11

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Answers (1)
  1. 28 September, 09:07
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    (3b) / (5b - 7) = 8/11

    cross multiply

    8 (5b - 7) = 11 (3b)

    40b - 56 = 33b

    -56 = 33b - 40b

    -56 = - 7b

    -56/-7 = b

    8 = b
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