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Z in (-oo:+oo)
Z/8 = 12/16 // - 12/16
Z/8-(12/16) = 0
Z/8-3/4 = 0
1/8*Z-3/4 = 0 // + 3/4
1/8*Z = 3/4 // : 1/8
Z = 3/4/1/8
Z = 6
Z = 6
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