方程组2x+3y-z=9 x+y+z=15 5方程组2x+3y-z=9 x+y+z=15 5x-4y-z=0的解,

方程组3x+y+2z=10,2x+3y-z=9,x+y+z=6 解方程组 x+y+z=5 2x-y-z=4 3x-2y-z=9 方程组3x-y-z=9,2x+y-2z=6,x+y+z=15 解方程组 :X+Y-3Z=1 Y+Z-3X=2 Z+X-3Y=3 解方程组 x+y+z=2 x-2y+z=-1 x+2y+3z=-1 解方程组：x-2y+z=-1,x+y+z=2,x+2y+3z=-1 x+y+z+2,4x+2y+z+2,9x+3y+z=6解方程组 三元一次方程组 ｛x+y-z=3x+y+z=1-x+2y+z=2 解方程组:x:y:z=1:2:3;x+y+z=12,求,x,y,z的值 解下列三元一次方程组:(1)x-z=4,x+y-z=-1,2y-z=1 (2)3x+4z=7,2x+3y+z=9,x-y+z=8 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! matlab解对数方程组[x,y,z]=solve('0.29744*x/(3+0.1*x+y+z)=(log10((3+x+y+z)/(3+0.1*x+y+z)))^2','0.79*x/(3+0.1*y+z)=(log10((3+x+y+z)/(3+0.1*x+y+z)*(3+y+z)/(3+0.1*y+z)))^2','1.25*x/(3+0.1*z)=(log10((3+x+y+z)/(3+0.1*x+y+z)*(3+y+z)/(3+0.*1y+z)*(3+z)/ 六年级三元一次方程组.解下列方程组：(1)5x-3y+z=25x+2y-4z=3-5x+y-z=2(2)x-y-z=-13x_5y+7z=114x-y+2z=-1(3)9x-5y+z=-69x+y+4z=3-9x+3y-5z=0(4)x+y=22x+z=-27y+z=13 已知方程组【X:Y:Z=1:3:2,X+Y+Z=8】求Y+3Z的值 已知方程组x:y:z=1:3:2 x+y+z=8 求y+3z的值 解方程组x-2y=-9 y-z=3 2z+x=47 解方程组{x:y:z=1:2:3 {2x+y-3z=15 解方程组X:y:z=3:2:1 2x+3y-Z=22