若x、y、z满足2x+3y+z=18,4x-3y+5y=24,求x+3y的值.

若X.Y.z满足2X+3Y+z=18,4X-3Y+5z=24,求X+3Y的值 若x、y、z满足2x+3y+z=18,4x-3y+5y=24,求x+3y的值. 已知x,y,z满足方程组：4x-5y+2z=o;x+4y-3x=0,求x:y:z的值 若x,y,z,满足3x+2y+z=5,2x+y-3z=1.y是非负数.求z的取值范围 已知x,y,z满足3x+7y+z=5 4x+10y+z=3 求x+y+z的值 已知x、y、z满足{3x+7y+z=5 ,求x+y+z的值 {4x+10y+z=3 已知x,y,z,同时满足方程x+3y-5z=0,2x-y-3z=0求x：y：z的值 若x:y:z=3:4:5且x+y+z=24,求x、y、z的值 若X:y:Z=3:4:5,且X+Y+Z=24,求X、Y、Z的值 若x/3=y/4=z/5,求x+y+z/3x-2y+z的值. x，y，z，满足等式3x+4y/2=6x+5y/3=4x-y+13z/2，求x+2y+z/2x+3y-z的值 已知x:：y：z=3：4：5,(1)求x+y分之z的值；（2）若x+y+z=6,求x,y,z.