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X in (-oo:+oo)
X/9 = 1.2-0.2 // - 1.2-0.2
X/9-1.2+0.2 = 0
1/9*X-1 = 0 // + 1
1/9*X = 1 // : 1/9
X = 1/1/9
X = 9
X = 9
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