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x in (-oo:+oo)
(2-x)/8 = -15 // + 15
(2-x)/8+15 = 0
(2-x)/8+(8*15)/8 = 0
8*15-x+2 = 0
122-x = 0
(122-x)/8 = 0
(122-x)/8 = 0 // * 8
122-x = 0
122-x = 0 // - 122
-x = -122 // * -1
x = 122
x = 122
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