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x in (-oo:+oo)
8/12 = x/8 // - x/8
8/12-(x/8) = 0
2/3-1/8*x = 0 // - 2/3
-1/8*x = -2/3 // : -1/8
x = -2/3/(-1/8)
x = 16/3
x = 16/3
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