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x in (-oo:+oo)
57/8-x = 13/16 // - 13/16
57/8-x-(13/16) = 0
57/8-x-13/16 = 0
101/16-x = 0 // - 101/16
-x = -101/16 // * -1
x = 101/16
x = 101/16
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