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x in (-oo:+oo)
26/850 = x/1000 // - x/1000
26/850-(x/1000) = 0
13/425-1/1000*x = 0 // - 13/425
-1/1000*x = -13/425 // : -1/1000
x = -13/425/(-1/1000)
x = 520/17
x = 520/17
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