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x in (-oo:+oo)
38 = 2*x-6*x+2 // - 2*x-6*x+2
38-(-6*x)-(2*x)-2 = 0
6*x-2*x-2+38 = 0
4*x+36 = 0 // - 36
4*x = -36 // : 4
x = -36/4
x = -9
x = -9
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