解方程组:y=2x-7① 3x+2y+4z=2② x+3y-6z=-10③
解方程组:2x+3y+z=3①,7x+6y+z=4②,x+y+z=7/3③.
解方程组:y=2x-7① 3x+2y+4z=2② x+3y-6z=-10③
解方程组{3x+y-z=4,2x-y+3z=12,x+y+z=6}
解方程组:x+y+z=4,x+y+2z=5,3x+y-z=6
已知,方程组:4x-3y-7z=0 x+2y=10z 则(x-y+z)÷(x+y+z)=——
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
解三元一次方程组:x+y+z=6,y-z=4,x-y-2z=3,
解方程组{6x=4y=3z,2x+y+z=22
解三元一次方程组:(一)2x+y+z=4① x-y+3z=3 ②x+z=2③ 二;①2x+y+z=2 ②x+2y+z=5
解方程组:2x+3y+4z=20,x+y+z=7
解方程组x+y+z=3 ① 3X+2Y+Z=2 ① 2x+3y+2z=7 ② X+3Y+2Z=1 ② x-y=0 ③ 2
解方程组x-4y+z=-3,2x+y-z=18,x-y-z=7.