2) 17d+53+28d+48+41d=86d+111
D=22;201
86×22+111=2003
86×201+111=17397
3)112=4x+3×+×
112=8x
X= 112÷8
X= 14
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2) 17d+53+28d+48+41d=86d+111
D=22;201
86×22+111=2003
86×201+111=17397
3)112=4x+3×+×
112=8x
X= 112÷8
X= 14