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x in (-oo:+oo)
4/2 = (6/3)*x+4 // - (6/3)*x+4
4/2-((6/3)*x)-4 = 0
4/2-2*x-4 = 0
-2*x-2 = 0 // + 2
-2*x = 2 // : -2
x = 2/(-2)
x = -1
x = -1
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