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x in (-oo:+oo)
7/9 = (x-9)/2 // - (x-9)/2
7/9-((x-9)/2) = 0
(-1*(x-9))/2+7/9 = 0
(-1*9*(x-9))/(2*9)+(2*7)/(2*9) = 0
2*7-1*9*(x-9) = 0
95-9*x = 0
(95-9*x)/(2*9) = 0
(95-9*x)/(2*9) = 0 // * 2*9
95-9*x = 0
95-9*x = 0 // - 95
-9*x = -95 // : -9
x = -95/(-9)
x = 95/9
x = 95/9
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