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x in (-oo:+oo)
X-(1/10) = x-(9/2) // - x-(9/2)
X-x-(1/10)+9/2 = 0
X-x-1/10+9/2 = 0
X-x+22/5 = 0 // - X+22/5
-x = -(X+22/5) // * -1
x = X+22/5
x = X+22/5
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