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2 = (x-9)/9 // - (x-9)/9
2-((x-9)/9) = 0
(-1*(x-9))/9+2 = 0
(-1*(x-9))/9+(2*9)/9 = 0
2*9-1*(x-9) = 0
27-x = 0
(27-x)/9 = 0
(27-x)/9 = 0 // * 9
27-x = 0
27-x = 0 // - 27
-x = -27 // * -1
x = 27
x = 27
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