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X in (-oo:+oo)
(5/12)*X+17 = 100 // - 100
(5/12)*X-100+17 = 0
5/12*X-83 = 0 // + 83
5/12*X = 83 // : 5/12
X = 83/5/12
X = 996/5
X = 996/5
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