6*(x+y)=8700 10*(y+z)=9500 5*(x+z)=5500 怎么解,是三元一次方程啊

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6*(x+y)=8700 10*(y+z)=9500 5*(x+z)=5500 怎么解,是三元一次方程啊
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6*(x+y)=8700 10*(y+z)=9500 5*(x+z)=5500 怎么解,是三元一次方程啊
6*(x+y)=8700 10*(y+z)=9500 5*(x+z)=5500 怎么解,是三元一次方程啊

6*(x+y)=8700 10*(y+z)=9500 5*(x+z)=5500 怎么解,是三元一次方程啊
6*(x+y)=8700 10*(y+z)=9500 5*(x+z)=5500
即x+y=1450 (1)
y+z=950 (2)
x+z=1100 (3)
(1)+(2)+(3)
2(x+y+z)=3500
x+y+z=1750 (4)
所以
(4)-(2),x=800
(4)-(3),y=650
(4)-(1),z=300

解方程组：{x(x+y+z)=6 {y(x+y+z)=9 {z(x+y+z)=10 方程组 3X-Y+Z=10 X+2Y-Z=6 X+Y+Z=12 {2x+3y-4z=-5 x+y+z=6 x-y+3z=10 x+y+z=4 2x+3y-z=6 3x+2y+2z=10 紧急..x+y+z=20x+2y+1.5z=367x+10y+6z=100 方程组3x+y+2z=10,2x+3y-z=9,x+y+z=6 x+y=6,y+z=8,x+z=10求x、y、z的值 若X+6Y+4Z=10 4X+4Y+Z=15求X+Y+Z (x+y-z)(x-y+z)= 方程组{x/2+y/3-z=-5,x/3-y/2+z/2=10,x/2-y/3-z/4=6,求x,y,z 已知4x-3y-6z=0,x+2y-7z=0,求5x+2y-z/2x-3y-10z 已知x^3+y^3-6x+2y+z+3+10=0,求（x-y+z)(x+y-z)的值.（z+3)是绝对值 解方程 x(x+y+z)=6 y(x+y+z)=12 z(x+y+z)=18 解方程组{x(x+y+z)=6,y(x+y+z)=12,z(x+y+z)=18 三元一次方程组,1.x-2y+z=9 2x+y+3z=10 3x+2y1.x-2y+z=92x+y+3z=103x+2y-z2.3x-5y+2z=14x+5y-z=5X-5y+3z=-23.7x+2y-z=76x-y+z=74x+3y+z=94.4x+3y-2z=-75x-6y+z=12x+z=-25.2x+3y-4z=-23x-2y+5z=262x+5z=31 x+y=8 y+z=12 x+z=10 x+y+z= x+y=8 y+z=12 x+z=10 x+y+z= x+y+z=15 x+5y+10z=70 x,y,z,各是几?