作业帮若x+2y+3z=10,4x+2y+2z=15,则x+y+z=?真的错了？浪费我脑细胞！
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若x+2y+3z=10,4x+2y+2z=15,则x+y+z=?真的错了？浪费我脑细胞！
若x+2y+3z=10,4x+2y+2z=15,则x+y+z=?
真的错了？浪费我脑细胞！
若x+2y+3z=10,4x+2y+2z=15,则x+y+z=?真的错了？浪费我脑细胞！
x+2y+3z=10,4x+2y+2z=15,则x+y+z=?
题目有错也许是x+2y+3z=10,4x+3y+2z=15,则x+y+z=?
或x+3y+3z=10,4x+2y+2z=15,则x+y+z=?
两式相加,两边同除以5可得
2y=10-3z-x代入二式得3x-z=5可知x和z的不确定性 可知这道题有问题 肯定的
这道题y的系数前后两式相加应为5 才可以算出来 答案是5
无解
假设m(x+2y+3z)+n(4x+2y+2z)=t(x+y+z)
则（m+4n)x+(2m+2n)y+(3m+2n)z=t(x+y+z)
得m+4n=2m+2n=3m+2n
解得m=n=0,不符可
故不存在
无解
2x+z=10 x+y-z=4 3x-y-z=0
(4x-2y-z)-{5x-[8y-2z-(x-2y)]-x-(3y-10z)}=?
x+2y=3x+2z=4y+z 求x:y:z
若x+y+z=3y=2z,则x/x+y+z=?
若x,y,z成等差数列,则(z-x)^2-4(x-y)(y-z)=
x+y/2=z+x/3=y+z/4 x+y+z=27
(4x-2y-z)-{5x-[8y-2z-(x+y)]-2(3y-10z)}=?好难啊
{2x+y=10 {x-y+z=4 {3x-y-z=0
试证明(x+y-2z)+(y+z-2x)+(z+x-2y)=3(x+y-2z)(y+z-2x)(z+x-2y)
已知(x+y)(x+z)=x,(y+z)(y+x)=2y,(z+x)(z+y)=3z,求x,y,z
X/10=Y/8=Z/9,则X+Y+Z/2Y-3Z
X=3z X+y+z=12 X+2y-2z=10
若|x+3|+|y-2|+|2×z+1|=0求(x×z-y×z)(y-x+z)的值
x=y/z=z/3,x+y+z ＝12,求2x+3y+4z是多少,
x+2y+3z=10,x-y+4z=10,x+3y+2z=2
x+2y+3z=10,x-y+4z=10,x+3y+2z=2
x-y+4z=10,x+3y+2z=2,x+2y+3z=11.
x+y+z=4 2x+3y-z=6 3x+2y+2z=10