100+(X- 100)/ 10 = 90+X/ 10
200+[X-(290+X/ 10)]/ 10 = 17 1+9X/ 100
90+X/ 10 = 17 1+9X/ 100
8 1=X/ 100
X=8 100
90+X/ 10=900
8 100÷900=9 (piece)
A: The total estate is 865,438+000 kroner, and there are 9 children, each of whom receives 900 kroner.