x:y:z=4:7:8 x+y+2z=54
方程组X:Y:Z=4:7:8,X+Y+2Z=54 求XYZ
解方程组:x:y:z=4:7:8,x+y+2z=54
已知X、Y、Z满足2X-Y+4Z=8(1);X-2Y-Z=7(2)求X-Y-Z的值
已知x,y,z满足2x-y+4z=8,x-2y-z=7,求x-y+z的值.要2种方法
已知:X、Y、Z满足2X-Y+4Z=8,X-2Y-Z=7,求X-Y+Z的值
已知x,y,z满足2x-y+4z=8,x-2y-z=7,求x-y+z的值.
1 已知想x,y,z满足2x-y+4z=8,x-2y-z=7,求x-y+z的值
{x+y+z=1;x+3y+7z=-1;z+5y+8z=-2
2X+Y+Z=10,X+2Y+Z=-6,X+Y+2Z=8 5X+4Y-3Y=13,2X-3Y+7Z=19,3X-Y=2X
int x,y,z; x=2; y=4; z=7; x=y--
三元一次方程组2x+z=3 3x+y-z=8 x+3y+2z=3 5x+2y-3z=2 x+2y+z=6 7x-2y-4
解方程组x:y:z=4:7:8 x+y+2z=54 x= y= z= 10:00之前给分