x+9y=1050
y=115
x=15
Z=2990
3x+y+z=31504x+10y+z=4200求x+y+z＝?
2个回答
相关问题
-
已知(x+y)(x+z)=x,(y+z)(y+x)=2y,(z+x)(z+y)=3z,求x,y,z
-
(x+y-z)/z=(y+z-x)/x=(z+x-y)/y 求(x+y)(y+z)(z+x)/xyz
-
若(x+y)/z=(y+z)/x=(x+z)/y 求（x+y-z)/(x+y+3z)的值
-
若x,y,z满足方程租3x＋7y－z＝3 4x＋10y－z＝2 求x＋y－z
-
已知(y+z-x)/(x+y+z)=(z+x-y)/(y+z-x)=(x+y-z)/(z+x-y)=p,求p^3+p^2
-
﹛x+y+z＝12﹛x+2y-z＝6﹛3x-y+z＝10
-
已知[y+z/x]=[z+x/y]=[x+y/z]（x+y+z≠0），求[x+y−z/x+y+z]的值．
-
方程组X+Y+Z=15,X+5Y+10Z=70求X,Y,Z
-
{3x-2y+5z=02x+5y-10z=192x+3y+15z=13{x+y=3y+z=5x+z=6
-
x,y,z满足x+y+z=3,x^2+y^2+z^2=29,x^3+y^3+z^3=45,求x,y,z,x^4+y^4+