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19 December, 06:00

Solve the following proportion. 15/21=5/x

A. 3

B. 105

C. 7

D. not given

+4
Answers (2)
  1. 19 December, 06:07
    0
    15/21 = 5/x

    15 * x = 21 * 5

    15x = 105

    x = 7
  2. 19 December, 06:23
    0
    If you would like to solve the following proportion 15 / 21 = 5 / x, you can do this as follows:

    15 / 21 = 5 / x / * x

    15 / 21 * x = 5 / * 21

    15 * x = 5 * 21 / 15

    x = 5 * 21 / 15

    x = 7

    The correct result would be C. 7.
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