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x in (-oo:+oo)
8*x-(1/8) = 7/5 // - 7/5
8*x-(1/8)-(7/5) = 0
8*x-1/8-7/5 = 0
8*x-61/40 = 0 // + 61/40
8*x = 61/40 // : 8
x = 61/40/8
x = 61/320
x = 61/320
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