2x+y-z=3 5x+3y-z=10 求x+y+z=

来源：学生作业帮编辑：神马作文网作业帮分类：数学作业时间：2024/11/13 18:34:06

在噢\7
我来见见你吧!虽然现在不上学了.
2X＋Y－Z＝3
4X+2Y-2Z=6
懂吧,两边都乘以2
(5X+3Y-Z)-(4X+2Y-2Z)=10－6＝4
简化下就行了
5X+3Y-Z-4X-2Y+2Z=X+Y+Z=4
等于4上面算出来了不懂追问\7
我来见见你吧!虽然现在不上学了.2X＋Y－Z＝3
4X+2Y-2Z=6
懂吧,两边都乘以2(5X+3Y-Z)-(4X+2Y-2Z)=10－6＝4简化下就行了
5X+3Y-Z-4X-2Y+2Z=X+Y+Z=4等于4上面算出来了不懂追问\7
我来见见你吧!虽然现在不上学了.2X＋Y－Z＝3 4X+2Y-2Z=6懂吧,两边都乘以2(5X+3Y-Z)-(4X+2Y-2Z)=10－6＝4简化下就行了5X+3Y-Z-4X-2Y+2Z=X+Y+Z=4等于4上面算出来了不懂追问

x/2=y/3=z/5 x+3y-z/x-3y+z 试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y) x/10 = y/8 =z/9 求x+2y+3z/y-5z x=y/z=z/3,x+y+z ＝12,求2x+3y+4z是多少, 若4x-3y-6z=0,x+2y-7z=0,求代数式5x*5x+2y*2y-z*z/2x*2x-3y*3y-10z*10 如果|x+y+z-6|+|2x+3y-z-12|+|2x-y-z|=0求x,y, 2分之x=3分之y=5分之z x+y+z=20 求x,y,z x/3=y/4=z/5,求x+y+z/3x-2y+z的值, 若x/3=y/4=z/5,求x+y+z/3x-2y+z的值. x+2y+3z=20,x+3y+5z=31,求x+y+z的值已知x:y:z=3:4:5,3x+2y-4z=18.求：x+y+z. 5x+3y+2z=2011 4x+6y+7z=2012 求x+y+z