E/e=((R+r)/r)

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Solution for E/e=((R+r)/r) equation: 


x in (-oo:+oo)

e/e = (R+r)/r // - (R+r)/r

e/e-((R+r)/r) = 0

(-1*(R+r))/r+1 = 0

(-1*(R+r))/r+(1*r)/r = 0

1*r-1*(R+r) = 0

-R = 0

-R/r = 0

-R/r = 0 // * r

-R = 0

x belongs to the empty set

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