y=x+z,y-x=2,x+10y+100z+99=z+10y+100x,联立这三个等式,答案是:x=3,y=5,z=2,算来算去不对,帮帮忙啊,
问题描述:
y=x+z,y-x=2,x+10y+100z+99=z+10y+100x,联立这三个等式,答案是:x=3,y=5,z=2,算来算去不对,帮帮忙啊,
要过程
答
y=x+z (1)y-x=2 (2)x+10y+100z+99=z+10y+100x(3)连(1)(2)可解得z=2把z=2 代入(3)可得x=3把x=3代入(2)可...