2x-1-3(y-2)=x 2(x-1)-y=4y-18,

问题描述:

2x-1-3(y-2)=x 2(x-1)-y=4y-18,

x-3y=-5 ……(1)
2x-5y=-16 ……(2)
由(1)*2-(2)得
x=-23
Y=-6