已知2/x=4/y=7/z,求(1)x:y:z(2)若2x+y+3z=58,分别求x,y,z的值.
已知2/x=4/y=7/z,求(1)x:y:z(2)若2x+y+3z=58,分别求x,y,z的值.
有关分式的数学题1、已知X/3=Y/5=Z/4,求(X+Y+Z)/Y和(X+Y+Z)/(Y-Z)的值.2、甲乙两人分别从
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.
已知x/2=y/4=z/7,求①x:y:z.②若2x+y+3z=58,分别求x,y,z的值.③求x+y/x+z的值.
已知有理数x,y,z,且|x-3|+2|y+1|+(2z+1)²=0,求x+y+z的相反数的倒数.
已知2x+3y-4z=0,3x+4y+5z=0,求x+y+z/(除以)x-y+z的值.
已知x/2=y/3=z/5,且3x+4z-2y=40,求x、y、z的值﹔详解
4x-3y-6z=0,x+2y-7z=0,xyz的积不等于0,求(x+y-z)/(x-y+2z)的值
x=y/z=z/3,x+y+z =12,求2x+3y+4z是多少,
已知x+4y+3z=3x-2y-5z=0,求x+2y-z/2x-3y+7z的值
已知X、Y、Z满足2X-Y+4Z=8(1);X-2Y-Z=7(2)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