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19 April, 08:41

E=I (R+r) solve for R

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Answers (2)
  1. 19 April, 08:49
    0
    Divide I from both sides then subtract r from both sides, too so in the end:

    R = (E-r) / I
  2. 19 April, 08:58
    0
    E:I = R+r

    R = (E:I) - r
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