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x in (-oo:+oo)
45/48 = x/16 // - x/16
45/48-(x/16) = 0
15/16-1/16*x = 0 // - 15/16
-1/16*x = -15/16 // : -1/16
x = -15/16/(-1/16)
x = 15
x = 15
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