作业帮已知x+y/2=y+z/3=x+z/4=-2,求x+2y+z的值
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已知x+y/2=y+z/3=x+z/4=-2,求x+2y+z的值
已知x+y/2=y+z/3=x+z/4=-2,求x+2y+z的值
已知x+y/2=y+z/3=x+z/4=-2,求x+2y+z的值
可列出x+y=-4,y+z=-6,x+z=-8,组成三元一次方程组,算得x=-3 y=-1 z=-5
x=-3
2y=-2
z=-5
x+2y+z=-10
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