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