解方程组{X:Y=3:2,Y:z=5:4,x+y+z=66}
解方程组:x+y+z=4,x+y+2z=5,3x+y-z=6
解方程组2x=3y,4y=5z,x+y+z=66
解三元一次方程组X:Y=3:2Y:Z=5:4X+Y+Z+66
解方程组{z=x+y 3x-2y-2z=-5 2x+y-z=3
解方程组 z=x+y 2x-3y+2z=5 x+2y-z=3
解方程组{3x+y-z=4,2x-y+3z=12,x+y+z=6}
解方程组x-4y+z=-3,2x+y-z=18,x-y-z=7.
x+y/2=z+x/3+y=z/4,...x+y+z=27.解方程组.
已知方程组4x-5y+2z=0 x+2y=3z 则x:y:z
解方程组:2x+3y+z=38,3x+4y +2z=56,4x+5y+z=66
用加减法解三元一次方程组 2x+3y+z=38 3x+4y+2z=56 4x+5y+z=66
解方程组2x+3y+z=38.3x+4y+2z=56.4x+5y+z=66