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X in (-oo:+oo)
(2/3)*X-(13/12) = (-5/12)*X // - (-5/12)*X
(2/3)*X-((-5/12)*X)-(13/12) = 0
(2/3)*X+(5/12)*X-13/12 = 0
13/12*X-13/12 = 0 // + 13/12
13/12*X = 13/12 // : 13/12
X = 13/12/13/12
X = 1
X = 1
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