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30 March, 22:41

R+12 = 3r + 4

What's the value of r?

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Answers (2)
  1. 30 March, 23:15
    0
    R + 12 = 3r + 4

    subtract 3r from both sides

    -3r + r + 12 = 3r - 3r + 4

    -2r + 12 = 4

    subtract 12 from both sides

    -2r + 12 - 12 = 4 - 12

    -2r = - 8

    divide by - 2

    r = 4
  2. 31 March, 01:50
    0
    4-12=8 then 3r-r=2r then you're left with 8=2r. 8 divided by two is 4. R=4
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