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

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


D( r )

r = 0

r = 0

r = 0

r in (-oo:0) U (0:+oo)

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

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

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

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

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

7*r-14*r-12 = 0

-7*r-12 = 0

(-7*r-12)/(2*r) = 0

(-7*r-12)/(2*r) = 0 // * 2*r

-7*r-12 = 0

-7*r-12 = 0 // + 12

-7*r = 12 // : -7

r = 12/(-7)

r = -12/7

r = -12/7

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