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x in (-oo:+oo)
1/(2^1) = x/22 // - x/22
1/(2^1)-(x/22) = 0
1/2-(x/22) = 0
1/2-1/22*x = 0 // - 1/2
-1/22*x = -1/2 // : -1/22
x = -1/2/(-1/22)
x = 11
x = 11
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