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x in (-oo:+oo)
0.4793/(-2.217) = x // - x
0.4793/(-2.217)-x = 0
-x-0.21619305 = 0 // + 0.21619305
-x = 0.21619305 // * -1
x = -0.21619305
x = -0.21619305
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