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d in (-oo:+oo)
5*d+3/10 = 553/10 // - 553/10
5*d+3/10-(553/10) = 0
5*d+3/10-553/10 = 0
5*d-55 = 0 // + 55
5*d = 55 // : 5
d = 55/5
d = 11
d = 11
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