(3/(5+R))+(R/(R+2))=((R+4)/(R+5))

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Solution for (3/(5+R))+(R/(R+2))=((R+4)/(R+5)) equation: 


D( R )

R+5 = 0

R+2 = 0

R+5 = 0

R+5 = 0

R+5 = 0 // - 5

R = -5

R+2 = 0

R+2 = 0

R+2 = 0 // - 2

R = -2

R in (-oo:-5) U (-5:-2) U (-2:+oo)

3/(R+5)+R/(R+2) = (R+4)/(R+5) // - (R+4)/(R+5)

3/(R+5)+R/(R+2)-((R+4)/(R+5)) = 0

3/(R+5)+R/(R+2)+(-1*(R+4))/(R+5) = 0

(3*(R+2))/((R+5)*(R+2))+(R*(R+5))/((R+5)*(R+2))+(-1*(R+4)*(R+2))/((R+5)*(R+2)) = 0

3*(R+2)+R*(R+5)-1*(R+4)*(R+2) = 0

R^2-R^2+8*R-6*R-8+6 = 0

2*R-2 = 0

(2*R-2)/((R+5)*(R+2)) = 0

(2*R-2)/((R+5)*(R+2)) = 0 // * (R+5)*(R+2)

2*R-2 = 0

2*R-2 = 0 // + 2

2*R = 2 // : 2

R = 2/2

R = 1

R = 1

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