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x in (-oo:+oo)
x/(-12.2) = 0.13 // - 0.13
x/(-12.2)-0.13 = 0
-0.08196721*x-0.13 = 0 // + 0.13
-0.08196721*x = 0.13 // : -0.08196721
x = 0.13/(-0.08196721)
x = -1.58600006
x = -1.58600006
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