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x in (-oo:+oo)
(-1/3)*(-(3*x)-4) = 1/2 // - 1/2
(-1/3)*(-(3*x)-4)-(1/2) = 0
(-1/3)*(-3*x-4)-1/2 = 0
-1/3*(-3*x-4)-1/2 = 0
(-1/3*2*(-3*x-4))/2-1/2 = 0
-1/3*2*(-3*x-4)-1 = 0
2*x+5/3 = 0
(2*x+5/3)/2 = 0
(2*x+5/3)/2 = 0 // * 2
2*x+5/3 = 0
2*x+5/3 = 0 // - 5/3
2*x = -5/3 // : 2
x = -5/3/2
x = -5/6
x = -5/6
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