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x in (-oo:+oo)
654*x+987/321 = 1456 // - 1456
654*x+987/321-1456 = 0
654*x-155463/107 = 0 // + 155463/107
654*x = 155463/107 // : 654
x = 155463/107/654
x = 51821/23326
x = 51821/23326
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