{5x-2y+z=12 {4x+3y+z=1 {7x+4y+z=2(解,要有过程)
解三元一次方程 (要有过程) x-y-z=-1 3x+5y+7z=11 4x-y+2z=-1
解下列方程组(1)3x-y+z=3 2x+y-3z=11 x+y+z=12(2)5x-4y+4z=13 2x+7y-3z
求三元一次方程组的解有过程 x-y-z=1 3x+5y+7z=11 4x-y+2z=-1
解三元一次方程组:(要有过程){x+y-z=0,x+2y+z=13,2x-3y+2z=5
2x+3y-4z=0.,3x+4y+5z=0,则x+y+z/x-y+z详细的解题过程
x-y-z=-1 3x+5y+7z=11 4x-y+2z=-1 分别求出x=?y=?z=?
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.
三元方程求救要过程2x+3y+z=383x+4y+2z=564x+5y+z=66x:y=5:3x:z=7:32x-y-z
解方程一;{x+y-z=6,x-3y+2z=1,3x+2y-z=-7.②{3x+4z=7,2x+3y+z=9,5x-9y
{5x-3y+z=2{5x+2y-4z=3{-5x+y-z=2 {x-y-z=-1{3x+5y+7z{4x-y+2x=-
x=y/z=z/3,x+y+z =12,求2x+3y+4z是多少,
(1){x-y=2 z-x=3 y+z=-1 (2){x-y-z=2 3x+5y+7z=24 4x-y+2z=26