x+y+z=16 5x+6y+7z=10
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x+y+z=165x+6y+7z=10x+y+z=165x+6y+7z=10x+y+z=165x+6y+7z=10x+2y-3z=05x-6y+7z=0然后:变形为5X+10Y-3Z=0(1式)5X-
x+y+z=16 5x+6y+7z=10
x+y+z=16 5x+6y+7z=10
x+y+z=16 5x+6y+7z=10
x+2y-3z=0 5x-6y+7z=0 然后:变形为 5X+10Y-3Z=0(1式) 5X-6Y+7Z=0(2式) 1式-2式:16Y-22Z=O Y=11Z/8 3X+6Y-9Z=0 (3式)
你在开玩笑吧?列出两个方程要求啥?
无解
解三元一次方程要三个方程
x+y+z=16 5x+6y+7z=10
1.{x:y:z=3:4:5 2x+3y-5z=-142.{x-y-z=-1 3x+5y+7z=11 4x-y+2z=-13.{x+y=1 x+z=0 2x+y+2z=44.{x-y+z=-3 2x-y-z=-2 -3x+y+z=-15.{x-y+z=-3 3x+y-4z=6 2x+y-z=36.{x-2y+5z=16 2x+y-5z=7 2x-y+z=38
已知4x-3y-6z=0,x+2y-7z=0,求5x+2y-z/2x-3y-10z
解方程组:{x(x+y+z)=6 {y(x+y+z)=9 {z(x+y+z)=10
x+y-z=3 y+z-x=5 z+x-y=7 求x,y,z
x+y+z=15 x+5y+10z=70 x,y,z,各是几?
x+y+z=15 x+5y+10z=70 x,y,z,各是几?
X+Y-Z=15 X+5Y+10Z=70 求:X、Y、Z
X:Y:Z=5:7:6 ﹛ 20X+10Y+5Z=48000
若X:Y:Z=5:6:7那么(Y-X):(Y+Z)和(X+2Y+3Z):(3X+2Y+Z)
(x+y-z)(x-y+z)=
fangchengzu:X+Z=Y 7Z=X+Y+Z X+Y+Z=14
接下列方程组 1.x+y=7,y+z=8,x+z=9,2.5x+y+z=6,x+5y+z=-2,x+y+5z=10
X+Y+Z=15 X+5Y+10Z=70,Y.Z的值
若3x+7y+z=5,4x+10y+z=3,则x+y+z=?
x/10=y/5=z/7 x+y+2z=29 求x y z
2x+5y+4z=6,3x+y-7z=-4,x+y-z=?
{2x+3y-4z=-5 x+y+z=6 x-y+3z=10