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x in (-oo:+oo)
3-(4*x) = 6*((2/3)*x-(1/2)) // - 6*((2/3)*x-(1/2))
3-(6*((2/3)*x-(1/2)))-(4*x) = 0
3-6*((2/3)*x-1/2)-4*x = 0
3-6*(2/3*x-1/2)-4*x = 0
3-6*(2/3*x-1/2)-4*x = 0
3-8*x+3 = 0
6-8*x = 0
6-8*x = 0
6-8*x = 0 // - 6
-8*x = -6 // : -8
x = -6/(-8)
x = 3/4
x = 3/4
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