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x in (-oo:+oo)
(2/3)*x = 4*x-6 // - 4*x-6
(2/3)*x-(4*x)+6 = 0
(2/3)*x-4*x+6 = 0
6-10/3*x = 0 // - 6
-10/3*x = -6 // : -10/3
x = -6/(-10/3)
x = 9/5
x = 9/5
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