SOLUTION: solve this formula for r. e/d=R+r/r

Question 894214: solve this formula for r. e/d=R+r/r
Answer by josgarithmetic(39618) (Show Source): You can put this solution on YOUR website!
Solve for r in:

Multiply both members by r.

Either r=0 which probably not what you want and will not work in the original equation;
Or .

QUESTION:
Why do you show r used in the equation in the expression of ?
This is simply equal to 1.
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