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18 August, 20:33

Q=3 (r+1) / r

Make r the subject of the formula

Answers (1)
  1. 18 August, 20:56
    Distribute the 3 to the parentheses. Q=3r+3/r

    Next multiply both sides by r to get rid of the division sign.


    Subtract 3r on both sides and you get Qr-3r=3

    Since both numbers have an r in it, we can factor out the r

    r (Q-3) = 3

    Then we divide Q-3 on both sides

    r=3 / (Q-3)
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