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x in (-oo:+oo)
2-(9*x) = x/2-1 // - x/2-1
1-(9*x)-(x/2)+2 = 0
1-9*x-(x/2)+2 = 0
3-19/2*x = 0 // - 3
-19/2*x = -3 // : -19/2
x = -3/(-19/2)
x = 6/19
x = 6/19
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