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x in (-oo:+oo)
x/(-3.1) = 4.5 // - 4.5
x/(-3.1)-4.5 = 0
-0.32258065*x-4.5 = 0 // + 4.5
-0.32258065*x = 4.5 // : -0.32258065
x = 4.5/(-0.32258065)
x = -13.94999979
x = -13.94999979
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