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15 October, 16:56

AB:BC is 3:4. Solve for x.

A. 11

B. 14

C. 120

D. 140

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Answers (1)
  1. 15 October, 17:13
    0
    AB:BC=3:4

    90: (10x-20) = 3:4

    3 (10x-20) = 90*4

    30x-60=360

    30x=420

    x=14
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