2x+4y-3z=9 3x-2y-4z=8 5x-6y-5z=7

x+2y=3x+2z=4y+z 求x:y:z x+y/2=z+x/3=y+z/4 x+y+z=27 x+y=5 2x+3y-z=9 x-y+z=4 2x+z=10 x+y-z=4 3x-y-z=0 x=y/z=z/3,x+y+z ＝12,求2x+3y+4z是多少, 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 解方程 x+y+z=0 4x+2y+z=3 9x-3y+z=28解方程x+y+z=04x+2y+z=39x-3y+z=28 2x+y-z=2 x-y+2z=2 3x+2y+4z=9 2x+y-z=2 x-y+2z=2 3x+2y+4z=9 {x+y+z=0 4x+2y+z=3 9x+3y+z=6 解方程组 x+y+z=5 2x-y-z=4 3x-2y-z=9 {x+y+z=0 {4x+2y+z=3 {9x+2y+z=6 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-2y-z)-{5x-[8y-2z-(x-2y)]-x-(3y-10z)}=? 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 2x+3y+z=13 4x^2+9y^2+z^2-2x+15y+3z=82 求x,y,z 3x-y+z=4,2z+3y-z=12,x+y+z=6的解