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7 September, 22:31

Solve 7w - 3r = 15 for r. Show your work.

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Answers (2)
  1. 7 September, 22:44
    0
    7w - 3r = 15

    7w - 3 (2) = 15

    7w - 6 = 15

    7w = 21

    /7 / 7

    w = 3
  2. 7 September, 22:49
    0
    What's w?

    Well without W, we just have to trial and error.

    R could be 2.

    7w - 3r = 15

    7w - 3 (2) = 15

    7w - 6 = 15

    7w = 21

    /7 / 7

    w = 3

    So if W = 3, R could be 2.
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