Solve this formula for r. Simplify your answer.
`E/d = (R + r)/r`
Make sure you use parentheses around any polynomials in the numerator and/or denominator.
1 Answer | Add Yours
Now multiply whole expression by `dr.`
Now divide whole expression by `(E-d).`
`r=(Rd)/(E-d)` <-- Your solution.
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