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x in (-oo:+oo)
22/2 = 2*x+1 // - 2*x+1
22/2-(2*x)-1 = 0
22/2-2*x-1 = 0
10-2*x = 0 // - 10
-2*x = -10 // : -2
x = -10/(-2)
x = 5
x = 5
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