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2 November, 10:18

12 r - 18 = 13 r + 18

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Answers (2)
  1. 2 November, 11:30
    0
    First you want to isolate the variable, do this by adding 18 to both sides. You're left with 12r = 13r + 36, then subtract 13r to get the variables alone. You're then left with - 1r = 36, multiply by - 1 to remove the negative. The final result would be (1) r = 36.
  2. 2 November, 13:38
    0
    12r-18=13r+18

    -12r. - 12r

    1r-18=18

    +18 + 18

    1r = 36

    1r/1=36/1

    r=36
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