y=(x-7)/(x-4)

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Solution for y=(x-7)/(x-4) equation: 


D( x )

x-4 = 0

x-4 = 0

x-4 = 0

x-4 = 0 // + 4

x = 4

x in (-oo:4) U (4:+oo)

y = (x-7)/(x-4) // - (x-7)/(x-4)

y-((x-7)/(x-4)) = 0

(-1*(x-7))/(x-4)+y = 0

(-1*(x-7))/(x-4)+(y*(x-4))/(x-4) = 0

y*(x-4)-1*(x-7) = 0

x*y-x-4*y+7 = 0

(x*y-x-4*y+7)/(x-4) = 0

(x*y-x-4*y+7)/(x-4) = 0 // * x-4

x*y-x-4*y+7 = 0

x*y-4*y+7 = 0 // - 7-4*y

x*y = -(7-4*y) // : y

x = (-(7-4*y))/y

x = -(y^-1*(7-4*y))

x = -(y^-1*(7-4*y))

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