解方程组:{x:y=6:4,y:z=5:4,x+y+z=132
解方程组:x+y+z=4,x+y+2z=5,3x+y-z=6
解方程组{3x+y-z=4,2x-y+3z=12,x+y+z=6}
解方程组x-y-3z=4 3x+y-z=6 -x+3y+z=8
解方程组{x(x+y+z)=6,y(x+y+z)=12,z(x+y+z)=18
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
解方程组6x=4y=3z,x+y+z=18
怎样解方程组x+y=8 y+z=6 z+x=4
解三元一次方程组X+Y+Z=100 6X+4Y+Z=200
解三元一次方程组x:y=3:2,y:z=5:4,x+y+z=6
解三元一次方程组:(1)x+2y+3z=11x-y+4z=10x+3y+2z=2(2)x:y=3:5y:z=5:6x+y
解方程组x-4y+z=-3,2x+y-z=18,x-y-z=7.