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x in (-oo:+oo)
8 = x/450000 // - x/450000
8-(x/450000) = 0
8-1/450000*x = 0 // - 8
-1/450000*x = -8 // : -1/450000
x = -8/(-1/450000)
x = 3600000
x = 3600000
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