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D( x )
19341*x+501990 = 0
19341*x+501990 = 0
19341*x+501990 = 0
19341*x+501990 = 0 // - 501990
19341*x = -501990 // : 19341
x = -501990/19341
x = -167330/6447
x in (-oo:-167330/6447) U (-167330/6447:+oo)
(4722*x+31243)/(19341*x+501990) = 0
4722*x+31243 = 0 // - 31243
4722*x = -31243 // : 4722
x = -31243/4722
x = -31243/4722
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