(4r-6)/(r-7)=1/2

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Solution for (4r-6)/(r-7)=1/2 equation: 


D( r )

r-7 = 0

r-7 = 0

r-7 = 0

r-7 = 0 // + 7

r = 7

r in (-oo:7) U (7:+oo)

(4*r-6)/(r-7) = 1/2 // - 1/2

(4*r-6)/(r-7)-(1/2) = 0

(4*r-6)/(r-7)-1/2 = 0

(2*(4*r-6))/(2*(r-7))+(-1*(r-7))/(2*(r-7)) = 0

2*(4*r-6)-1*(r-7) = 0

7*r-5 = 0

(7*r-5)/(2*(r-7)) = 0

(7*r-5)/(2*(r-7)) = 0 // * 2*(r-7)

7*r-5 = 0

7*r-5 = 0 // + 5

7*r = 5 // : 7

r = 5/7

r = 5/7

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