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x in (-oo:+oo)
(3/(-2))*x = (2/3)*x-13 // - (2/3)*x-13
(3/(-2))*x-((2/3)*x)+13 = 0
(3/(-2))*x+(-2/3)*x+13 = 0
13-13/6*x = 0 // - 13
-13/6*x = -13 // : -13/6
x = -13/(-13/6)
x = 6
x = 6
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