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x in (-oo:+oo)
(2*x)/3-(3*x)-4 = 1/2 // - 1/2
(2*x)/3-(3*x)-(1/2)-4 = 0
(2*x)/3-3*x-1/2-4 = 0
-7/3*x-9/2 = 0 // + 9/2
-7/3*x = 9/2 // : -7/3
x = 9/2/(-7/3)
x = -27/14
x = -27/14
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