x=5,x+5y-2z=-4,4x-3y+2z=1求解急一定要标准今天就要 验算步骤也要2){x+y=22x+z=-27y+x=13还有要求一样
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![x=5,x+5y-2z=-4,4x-3y+2z=1求解急一定要标准今天就要 验算步骤也要2){x+y=22x+z=-27y+x=13还有要求一样](/uploads/image/z/13401705-57-5.jpg?t=x%3D5%2Cx%2B5y-2z%3D-4%2C4x-3y%2B2z%3D1%E6%B1%82%E8%A7%A3%E6%80%A5%E4%B8%80%E5%AE%9A%E8%A6%81%E6%A0%87%E5%87%86%E4%BB%8A%E5%A4%A9%E5%B0%B1%E8%A6%81+%E9%AA%8C%E7%AE%97%E6%AD%A5%E9%AA%A4%E4%B9%9F%E8%A6%812%EF%BC%89%EF%BD%9Bx%2By%3D22x%2Bz%3D-27y%2Bx%3D13%E8%BF%98%E6%9C%89%E8%A6%81%E6%B1%82%E4%B8%80%E6%A0%B7)
x=5,x+5y-2z=-4,4x-3y+2z=1求解急一定要标准今天就要 验算步骤也要2){x+y=22x+z=-27y+x=13还有要求一样
x=5,x+5y-2z=-4,4x-3y+2z=1求解急一定要标准今天就要 验算步骤也要
2){x+y=22
x+z=-27
y+x=13
还有要求一样
x=5,x+5y-2z=-4,4x-3y+2z=1求解急一定要标准今天就要 验算步骤也要2){x+y=22x+z=-27y+x=13还有要求一样
1、(1)x+5y-2z=-4
(2)4x-3y+2z=1
把x=5代入
(3)5y-2z=-9
(4)-3y+2z=-19
把(3)(4)相加
2y=-28
y=-14代入到(3)
-2z=61
z=-30.5
把x=5,y=-14,z=-30.5分别代入到(1)(2)
(1)5+5(-14)-2(-30.5)
=5-70+61
=-4
(2)4×5-3(-14)+2(-30.5)
=20+42-61
=1
2、(1)x+y=22
(2) x+z=-27
(3) y+x=13
这题不合情理,(1)和(3)式矛盾
(4x-2y-z)-{5x-[8y-2z-(x-2y)]-x-(3y-10z)}=?
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuaihuajian
x+y=5 2x+3y-z=9 x-y+z=4
设|x|-|y|+|z|=|x+y+z|,且|x+y|=4,|y+z|=5,|y|=3,求(x-y-z)^2的值
(4x-2y-z)-{5x-[8y-2z-(x+y)]-2(3y-10z)}=?好难啊
(x+y):(y+z):(z+x)=3:4:5 3x+y-z=-4已知(x+y):(y+z):(z+x)=3:4:5 ;3x+y-z=-4求x y z
已知:4x-5y+2z=0 x+4y-3z=0则:(x*x+y*y+z*z)/(x*y+y*z+z*x)=____.
{5x-3y+z=2{5x+2y-4z=3{-5x+y-z=2 {x-y-z=-1{3x+5y+7z{4x-y+2x=-1
x:y=2:3 x:z=5:4 x+y+z=33
3x-2y+z=4 x+y-z=5 4x-4y+3z=27
{ 5x-3y+z=25x+2y-4z=3-5x+y-z=2
x+y+z=4,x+2y-z=4,3x-y+4z=5
已知(x+2y)/3=(y+3z)/4=(z+5x)/5,则x:y:z=
已知x+2y/3=y+3z/4=z+5x/5,则x:y:z=?
已知x+2y/3=y+3z/4=z+5x/5,则x:y:z=
x-y+z=-1 5x+2y-z=6 4x-3y+2z=-5
x:y=3:2 y:z=5:4 x+y+z=66
x:y=3:2 y:z=5:4 x+y+z=66