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x in (-oo:+oo)
2*x-(2*(2*x+8/3))-6 = 4*x+2 // - 4*x+2
2*x-(2*(2*x+8/3))-(4*x)-6-2 = 0
2*x-2*(2*x+8/3)-4*x-6-2 = 0
2*x-2*(2*x+8/3)-4*x-6-2 = 0
-2*x-4*x-6-16/3-2 = 0
-6*x-6-16/3-2 = 0
-6*x-34/3-2 = 0
-6*x-40/3 = 0
-6*x-40/3 = 0
-6*x-40/3 = 0 // + 40/3
-6*x = 40/3 // : -6
x = 40/3/(-6)
x = -20/9
x = -20/9
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