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29 March, 12:24

Step by step 6r+7=13+7r

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Answers (2)
  1. 29 March, 12:45
    0
    6r+7=13+7r

    6r-7r=13-7

    -r = 6

    r = - 6
  2. 29 March, 15:27
    0
    6r + 7 = 13 + 7r ... subtract 7r from both sides

    6r - 7r + 7 = 13 + 7r - 7r ... simplify

    -r + 7 = 13 ... subtract 7 from both sides

    -r + 7 - 7 = 13 - 7 ... simplify

    -r = 6 ... multiply by - 1 to make r positive

    r = - 6
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