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x in (-oo:+oo)
x/(-4.5) = -9.2 // + 9.2
x/(-4.5)+9.2 = 0
9.2-0.22222222*x = 0 // - 9.2
-0.22222222*x = -9.2 // : -0.22222222
x = -9.2/(-0.22222222)
x = 41.40000041
x = 41.40000041
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