y=(x-12)/(x-7)

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Solution for y=(x-12)/(x-7) equation: 


D( x )

x-7 = 0

x-7 = 0

x-7 = 0

x-7 = 0 // + 7

x = 7

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

y = (x-12)/(x-7) // - (x-12)/(x-7)

y-((x-12)/(x-7)) = 0

(-1*(x-12))/(x-7)+y = 0

(-1*(x-12))/(x-7)+(y*(x-7))/(x-7) = 0

y*(x-7)-1*(x-12) = 0

x*y-x-7*y+12 = 0

(x*y-x-7*y+12)/(x-7) = 0

(x*y-x-7*y+12)/(x-7) = 0 // * x-7

x*y-x-7*y+12 = 0

x*y-7*y+12 = 0 // - 12-7*y

x*y = -(12-7*y) // : y

x = (-(12-7*y))/y

x = -(y^-1*(12-7*y))

x = -(y^-1*(12-7*y))

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