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x in (-oo:+oo)
44/45 = x+7/9 // - x+7/9
44/45-x-(7/9) = 0
44/45-x-7/9 = 0
1/5-x = 0 // - 1/5
-x = -1/5 // * -1
x = 1/5
x = 1/5
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