已知x:y:z=3:4:7且2x-y+z=18求x+2y-3z的值
来源:学生作业帮助网 编辑:六六作业网 时间:2024/08/31 01:02:23
已知x:y:z=3:4:7且2x-y+z=18求x+2y-3z的值已知x:y:z=3:4:7且2x-y+z=18求x+2y-3z的值已知x:y:z=3:4:7且2x-y+z=18求x+2y-3z的值令
已知x:y:z=3:4:7且2x-y+z=18求x+2y-3z的值
已知x:y:z=3:4:7且2x-y+z=18求x+2y-3z的值
已知x:y:z=3:4:7且2x-y+z=18求x+2y-3z的值
令X=3K,Y=4K:Z=7K
则2*3K-4K+7K=18
所以,K=2;
X+2Y-3Z=3K+8K-21K=-10K=-20
已知x:y:z=2:3:4,且x-y+z=36,求x+y+z的值.
已知x:y:z=2:3:4且x+z-y=36求x+y+z的值
已知x:y:z=2:3:4,且x+z-y=36.求x+y+z的值
已知x:y:z=2:3:4,且x+y+z=18.求x、y、z的值.
已知x,y,z满足方程组x-2y+z=0 7x+4y-5z=0,且z不等于0,2x²-3y²+z²/y²-2z²的值为?
已知x/2=y/3=z/4,且x+y+z不等于0,求2x+3y-4z/x+y+z的值
已知x/2=y/3=z/4,且x+y+z不等于0,求2x+3y-4z/x+y+z的值
已知X+Y/2=Y+Z/3=Z+X/4,且2X+4Y+6Z=120,求X,Y,Z的值
已知x+y/2=y+z/3=x+z/4 且2x+4y+6z=120,求x、y、z的值
已知x.y.z满足x-2y+z=0且7x+4y-5z=0,求x:y:z的值
已知x+y/2=y+z/3=z+x/4,且x+2y+z=12,求x-2y+z的值
已知方程组4x-y+3z=0 2x+y+6z=0且xyz不等于0,则x/y+y/z+z/x是多少
已知4x-3y-6z=0,x+2y-7z=0,且x、y、z都不为0,求(3x+2y+z)/(x+2y+3z)的值 快帮求一求
已知4x-3y-6z=0 ① ,x+2y-7z=0 ②,且x,y,z均不为0,求3x+2y+z÷x+2y+3z的值
已知4x-3y-6z=0,x+2y-7z=0,且x,y,z都不为0,求(3x+2y+z)/(x+2y+3z)的值
已知4x-3y-6z=0 ① ,x+2y-7z=0 ②,且x,y,z均不为0,求3x+2y+z÷x+2y+3z的值
已知4x-3y-6z=0,x+2y-7z=0,且x,y,z≠0,求2x+3y+6z/x+5y+5z的值.
已知整数x、y、z,满足x≤y<z,且|x+y|+|y+z|+|z+x|=4,|x-y|+|y-z|+|z-x|=2,求x^2+y^2+z^2的值.