9x-5y+z=-6,9x+y+4z=3,-9x+3y-5z=0急今天就要,标准标准!还要验算
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9x-5y+z=-6,9x+y+4z=3,-9x+3y-5z=0急今天就要,标准标准!还要验算
9x-5y+z=-6,9x+y+4z=3,-9x+3y-5z=0急今天就要,标准标准!还要验算
9x-5y+z=-6,9x+y+4z=3,-9x+3y-5z=0急今天就要,标准标准!还要验算
9x+y+4z=3,-9x+3y-5z=0 相加
4y-z=3
z=4y-3
9x-5y+z=-6 -9x+3y-5z=0 相加
-2y-4z=-6
y+2z=3
y+2(4y-3)=3
y+8y-6=3
9y=9
y=1
z=4y-3=1
9x-5+1=-6
9x=-2
x=-2/9
9x-5y+z=-6,①
9x+y+4z=3,②
-9x+3y-5z=0③ 由②-①得 6Y+3Z=9 ④
由③+②得 4Y-Z=3⑤
3×⑤+④得 Y=1 Z=1 再代入①得 X=-2/9
∴ X=-2/9 Y=1 Z=1 验算后计算无误
三元一次方程组,1.x-2y+z=9 2x+y+3z=10 3x+2y1.x-2y+z=92x+y+3z=103x+2y-z2.3x-5y+2z=14x+5y-z=5X-5y+3z=-23.7x+2y-z=76x-y+z=74x+3y+z=94.4x+3y-2z=-75x-6y+z=12x+z=-25.2x+3y-4z=-23x-2y+5z=262x+5z=31
三元一次方程解 1.{x+y-z=5 {3x+2y+z=2 {2x-2y+z=-31.{x+y-z=5 2.{9x-5y+x=-6 3.{x-y=3 4.{x+y=3 5.{4x-2y+z=7{3x+2y+z=2 {9x+y-2z=3 {x+z=7 {y+z=4 {2x-y-3z=28{2x-2y+z=-3 {-9x+3y-5z=0 {y-z=6 {z+x=5 {x+y-2z=13
..1.x+y+z=26,2.4y+3z=7,y-z=1,3x+2z=17,x+2y-z=18 9x-7y=173.x-7y+3z=17 4.2x+4y+3z=95x-6y-z=24 3x-2y+5z=113x+7y-2z=1 5x-6y+7z=131.x+y+z=26,y-z=1x+2y-z=18 2.4y+3z=7,3x+2z=11,9x-7y=17 3.x-7y+3z=17 5x-6y-z=24 3x+7y-2z=14.2x+4y+3z=93x-2y+5z=11 5x-6y+7z=13
x+y=5 2x+3y-z=9 x-y+z=4
已知x-y/x+y=y+z/2(y-z)=z+x/3(z-x),求证8x+9y+5z=0THX..
解方程组3x+y+z=6,x+3y+z=5,x+y+3z=9{3x+y+z=6{x+3y+z=5{x+y+3z=9
三元一次方程x+y+z=0 4x+2y+z=3 9x+3y+z=6x+y+z=04x+2y+z=3 9x+3y+z=6
3x+y+z=6 x+3y+z=5 x+y+3z=9
{x+y+z=0 4x+2y+z=3 9x+3y+z=6
{x+y+z=0 {4x+2y+z=3 {9x+2y+z=6
解方程组 x+y+z=5 2x-y-z=4 3x-2y-z=9
2x+3y-z=9,x+y+z=15,5x-4y-z=0
x+y+z+2,4x+2y+z+2,9x+3y+z=6解方程组
4x+9y=12 3y-2y+5z=11 5x-6y+7z=13 求:x y z等于多少
解方程组2x+y-3z=1,x-2y+z=6,3x-y+2z=9求x,y,z的值解方程组6x+y-z=0,3x-y+z=5,y+2z=4求x,y,z的值 真的实在解不出来,希望你能帮帮忙!
9x-5y+z=-6 9x+y-2z=3 -9x+3y-5z=0 求x y z
6x+3y-2z=108,9x+7y-3z=212,3x-2y+5z=38,求x,y,z
解方程组:{x(x+y+z)=6 {y(x+y+z)=9 {z(x+y+z)=10