11x+8y-9z=10,6x+3y-8z=1,21x+10y-25z=6要详细步骤
2X+Y+Z=10,X+2Y+Z=-6,X+Y+2Z=8 5X+4Y-3Y=13,2X-3Y+7Z=19,3X-Y=2X
(1)3x+4y=15 2y-z=2 x+2z=9 (2) x+y+z=8 2x+3y-z=6 3x-y+z=8 (3)
x/10 = y/8 =z/9 求x+2y+3z/y-5z
若{x+3y+10z=0 则 (x+y-z)/(x-y+z)
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuai
解方程组x-y-3z=4 3x+y-z=6 -x+3y+z=8
若x+3y+5z=10,5x+z+3y=8,x+y+z=?
{2x+3y-4z=-5 x+y+z=6 x-y+3z=10
x+y+z=4 2x+3y-z=6 3x+2y+2z=10
3x+7y+z=5 ,4x+10y+z=6 ,x+y+z=
已知3X+7Y+Z=6 4X+10Y+z=7 求X+Y+Z=?
解三元一次方程组:(1)x+2y+3z=11x-y+4z=10x+3y+2z=2(2)x:y=3:5y:z=5:6x+y