(x+8)/7=(x+9)/9

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Solution for (x+8)/7=(x+9)/9 equation: 


x in (-oo:+oo)

(x+8)/7 = (x+9)/9 // - (x+9)/9

(x+8)/7-((x+9)/9) = 0

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

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

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

2*x+9 = 0

(2*x+9)/(7*9) = 0

(2*x+9)/(7*9) = 0 // * 7*9

2*x+9 = 0

2*x+9 = 0 // - 9

2*x = -9 // : 2

x = -9/2

x = -9/2

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