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x in (-oo:+oo)
6.1 = x/0.009 // - x/0.009
6.1-(x/0.009) = 0
6.1-111.11111111*x = 0
6.1-111.11111111*x = 0 // - 6.1
-111.11111111*x = -6.1 // : -111.11111111
x = -6.1/(-111.11111111)
x = 0.0549
x = 0.0549
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