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x in (-oo:+oo)
(2/3)*x = (12/5)*x+2/15 // - (12/5)*x+2/15
(2/3)*x-((12/5)*x)-(2/15) = 0
(2/3)*x+(-12/5)*x-2/15 = 0
-26/15*x-2/15 = 0 // + 2/15
-26/15*x = 2/15 // : -26/15
x = 2/15/(-26/15)
x = -1/13
x = -1/13
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