若3x+5y+6z=5,4x+2y+z=2,则x+y+z的值等于【】
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:2024/07/15 16:02:55
若3x+5y+6z=5,4x+2y+z=2,则x+y+z的值等于【】
3x+5y+6z=5,4x+2y+z=2
将以上两式相加得:
7x+7y+7z=7
所以x+y+z=1
再问: 明白了!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
再答: 不客气:)
将以上两式相加得:
7x+7y+7z=7
所以x+y+z=1
再问: 明白了!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
再答: 不客气:)
若3x+5y+6z=5,4x+2y+z=2,则x+y+z的值等于【】
若3x+5y+6z=5,4x+2y+z=2,则x+y+z的值等于( )
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.
若4x=7y+5z,2x+y=z,则x:y:z的值为
若x/3=y/4=z/5,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/4=y/5=z/6,求x+y+z/3x-2y+z的值.
若2x+5y+4z=0,3x+y-7z=0,则x+y-z的值等于( )
4x-3y-6z=0,x+2y-7z=0是一个方程组,那么x-y+z/x+y+z的值等于
若x:y:z=3:4:5=6,求x-y+z分之x+y-z的值
x/3=y/4=z/5,求x+y+z/3x-2y+z的值,
若 x/2等于y/3等于z/4,且x+y-z=5 求xyz的值