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x in (-oo:+oo)
(17/12)*x = 57/6 // - 57/6
(17/12)*x-(57/6) = 0
(17/12)*x-19/2 = 0
17/12*x-19/2 = 0 // + 19/2
17/12*x = 19/2 // : 17/12
x = 19/2/17/12
x = 114/17
x = 114/17
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