2x+Y+3z=23,x+4y+5z=36,求X+2Y+3z~
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/10 10:57:16
2x+Y+3z=23,x+4y+5z=36,求X+2Y+3z~
2x+Y+3z=23...(1)
x+4y+5z=36...(2)
(2)*2-(1)
7Y+7Z=49
Y+Z=7
x+4y+5z=36=X+2Y+3Z+2(Y+Z)
X+2Y+3Z=36-2*7=22
x+4y+5z=36...(2)
(2)*2-(1)
7Y+7Z=49
Y+Z=7
x+4y+5z=36=X+2Y+3Z+2(Y+Z)
X+2Y+3Z=36-2*7=22
x=y/z=z/3,x+y+z =12,求2x+3y+4z是多少,
已知x:y:z=2:3:4,且x-y+z=36,求x+y+z的值.
已知x:y:z=3:4:5,3x+2y-4z=18.求:x+y+z.
x/3=y/4=z/5,求x+y+z/3x-2y+z的值,
若x/3=y/4=z/5,求x+y+z/3x-2y+z的值.
已知2x+5y+4z=6 3x+y-7z=-4求x+y-z
5x+3y+2z=2011 4x+6y+7z=2012 求x+y+z
已知x/4=y/5=z/6 求x+y+z/3x-2y+z的值
已知x/4=y/5=z/6,求x+y+z/3x-2y+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.
已知3x=4y,2y=5z,试求x:y:z
3x=4y 2y=5z 试求x:y:z