1/4+1/(R-2)=1/5

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Solution for 1/4+1/(R-2)=1/5 equation:


D( R )

R-2 = 0

R-2 = 0

R-2 = 0

R-2 = 0 // + 2

R = 2

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

1/(R-2)+1/4 = 1/5 // - 1/5

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

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

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

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

5*R-4*R+8+10 = 0

R+18 = 0

(R+18)/(4*5*(R-2)) = 0

(R+18)/(4*5*(R-2)) = 0 // * 4*5*(R-2)

R+18 = 0

R+18 = 0 // - 18

R = -18

R = -18

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