(4+x)/5=(x+8)/9

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Solution for (4+x)/5=(x+8)/9 equation: 


x in (-oo:+oo)

(x+4)/5 = (x+8)/9 // - (x+8)/9

(x+4)/5-((x+8)/9) = 0

(x+4)/5+(-1*(x+8))/9 = 0

(9*(x+4))/(5*9)+(-1*5*(x+8))/(5*9) = 0

9*(x+4)-1*5*(x+8) = 0

4*x-4 = 0

(4*x-4)/(5*9) = 0

(4*x-4)/(5*9) = 0 // * 5*9

4*x-4 = 0

4*x-4 = 0 // + 4

4*x = 4 // : 4

x = 4/4

x = 1

x = 1

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