恳请解初一数学难题:已知数X,Y满足|X+7|+|1-X|=19-|Y―10|―|1+Y|...答:|X+7|+|1-X|=19+y-10+1+y=10+2y>=0,y>=-5 1-1):-5<=y<=-1,x<=-7 -x-7+1-x=-6-2x=10+2y,2x+2y=-16,x+y=-8 1-2):-5<=y<=-1,-7<=x<=1 x+7+1-x=8=10+2y,y=-1,-8<=x+y<=0 1-3):-5<=y<=-1,x>=1 x+7-1+x=2x+6=10+2y,x=y+2...