作业帮若3x+7y+z=5,4x+lOy+z=3,则x+y+z的值等于______
来源：学生作业帮助网 编辑：作业帮 时间：2024/10/07 01:01:44
x){ѽԸBۼRTǤB; 4y1B|>iÞk;"}rِm߳KoP6OAc֪maT[ik
֣v@277ڿ ,nM98Q( Dm$D[K$[]CC }!z,m @
2+
若3x+7y+z=5,4x+lOy+z=3,则x+y+z的值等于______
若3x+7y+z=5,4x+lOy+z=3,则x+y+z的值等于______
若3x+7y+z=5,4x+lOy+z=3,则x+y+z的值等于______
此类提的解法,3x+7y+z=5,3(x+y+z)+2(2y-z)=5
4x+10y+z=3,4(x+y+z)+3(2y-z)=3
另x+y+z=a,2y-z=b,则3a+2b=5,4a+3b=3,a=9,b=-11,
得x+y+z=9
若3x+7y+z=5,4x+lOy+z=3,则x+y+z的值等于______
若3x+7y+z=5,4x+10y+z=3,则x+y+z=?
x+y-z=3 y+z-x=5 z+x-y=7 求x,y,z
若xyz≠0且4(x/z)-5(y/z)=-2,(x/z)+4(y/z)=3,求x:y:z
若X:Y:Z=5:6:7那么(Y-X):(Y+Z)和(X+2Y+3Z):(3X+2Y+Z)
若x+2y-9z=0,x-2y+5z=0,(x.y.z≠=0)求2x平方+3y平方+7z平方/x平方-4y平方+4z平方
2x+5y+4z=6,3x+y-7z=-4,x+y-z=?
若x/2=y/3=z/4,则3x-2y+5z/x+y+z=
若4x=7y+5z,2x+y=z,则x:y:z的值为
X-Y-Z=0 X+Y-3Z=4 2X-5Y+7Z=21
3x+7y+4z=35,x+5y+2z=40,x+y+z=( )
{x+y+z=1 {x+3y+7z=2 {x+5y+19z=4
已知2x+5y+4z=6 3x+y-7z=-4求x+y-z
若x/3=y/4=z/5,求x+y+z/3x-2y+z的值.
5x+3y+2z=2011 4x+6y+7z=2012 求x+y+z
若x:y:z=3:4:5=6,求x-y+z分之x+y-z的值
若x+y:y+z:z+x=3:4:5,则x:y:z=?(急,)
若x:y:z=3:4:5且x+y+z=24,求x、y、z的值