3元1次方程组X+Y-Z=6 1X-Y+2Z=-7 23X+2Y+Z=7 3
解3元1次方程组如下; 2X-Y=7 5X+3Y+2Z=2 3X-4Z=4
解3元1次方程组如下; 4X-9Z=17 3X+Y+15Z=18 X+2Y+3Z=2
解3元1次方程组3元1次方程组2x+3y=10x+z=5z+y=7.5
3元1次方程组 x+y-z=4 (1) 2x-y=5-x (2) x-3y+z=-2 (3)
3元1次方程x-2y=-9 3x-y+z=4{ y-z=3 { 2x+3y-z=122z+x=47 x+y+z=6
解方程组x+2y-z=1 ,3x-3y+z=2,2x+3y+z=7和方程组x+y=-14,y+z=-7,x+z=19
解方程组2x+y-3z=1,x-2y+z=6,3x-y+2z=9求x,y,z的值
4x-3y-6z=0,x+2y-7z=0是一个方程组,那么x-y+z/x+y+z的值等于
解方程组2x+y-z=7 x+y+z =1 2x-y-z=5
解方程组:x-2y+z=-1,x+y+z=2,x+2y+3z=-1
解下列方程组(1)3x-y+z=3 2x+y-3z=11 x+y+z=12(2)5x-4y+4z=13 2x+7y-3z
解方程组(1){3x+2y+z=7,2x+3y+4z=3,x+4y+6z=1