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x in (-oo:+oo)
2*x+8 = 2/3 // - 2/3
2*x-(2/3)+8 = 0
2*x-2/3+8 = 0
2*x+22/3 = 0 // - 22/3
2*x = -22/3 // : 2
x = -22/3/2
x = -11/3
x = -11/3
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