(X-4)/7-1=(x-9)/8

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Solution for (X-4)/7-1=(x-9)/8 equation: 


x in (-oo:+oo)

(X-4)/7-1 = (x-9)/8 // - (x-9)/8

(X-4)/7-((x-9)/8)-1 = 0

(X-4)/7+(-1*(x-9))/8-1 = 0

(8*(X-4))/(7*8)+(-1*7*(x-9))/(7*8)+(-1*7*8)/(7*8) = 0

8*(X-4)-1*7*(x-9)-1*7*8 = 0

8*X-7*x-56+31 = 0

8*X-7*x-25 = 0

(8*X-7*x-25)/(7*8) = 0

(8*X-7*x-25)/(7*8) = 0 // * 7*8

8*X-7*x-25 = 0

8*X-7*x-25 = 0 // - 8*X-25

-7*x = -(8*X-25) // : -7

x = (-(8*X-25))/(-7)

x = (25-(8*X))/(-7)

x = (25-(8*X))/(-7)

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