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x in (-oo:+oo)
2 = (8/2)*x-1 // - (8/2)*x-1
1-((8/2)*x)+2 = 0
1-4*x+2 = 0
3-4*x = 0 // - 3
-4*x = -3 // : -4
x = -3/(-4)
x = 3/4
x = 3/4
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