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x in (-oo:+oo)
-13/45 = x+1/9 // - x+1/9
-x-13/45-(1/9) = 0
-x-13/45-1/9 = 0
-x-2/5 = 0 // + 2/5
-x = 2/5 // * -1
x = -2/5
x = -2/5
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