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x in (-oo:+oo)
(2/3)*(6*x+12) = -2 // + 2
(2/3)*(6*x+12)+2 = 0
2/3*(6*x+12)+2 = 0
2/3*(6*x+12)+2 = 0
4*x+10 = 0
4*x+10 = 0
4*x+10 = 0 // - 10
4*x = -10 // : 4
x = -10/4
x = -5/2
x = -5/2
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