{x+y-2z=5① {2x-y+z=4② {2x+y-3z=10③ 解一元三次方程 要过程
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
解方程:{2x+3y+z=7,x+y+z=4,3x+y-z=-4
解方程{3x -y+z=4 2x+3y-z=12 x+y+z=6
解方程x-y+z=5,①2x+y-3z=15②,3x-2y+z=16③
解方程:x+y+z=0 ① 4x+2y+z=3 ② 9x+3y+z=6 ③
解关于w,x,y,z的方程w+8x+3y+5z=20①,4w+7x+2y+3z=-20②,6w+3x+8y+7z=20③
{5X+Y+Z①X+5Y+Z=-2②X+Y+5Z=10③
2x+3y-4z=0.,3x+4y+5z=0,则x+y+z/x-y+z详细的解题过程
解三元一次方程组:(一)2x+y+z=4① x-y+3z=3 ②x+z=2③ 二;①2x+y+z=2 ②x+2y+z=5
解方程:2x+y+3z=11,3x+2y-2z=11,4x-3y-2z=4(过程)
方程(z=x+y,2x-3y+2z=5,x-2y-z=3)求三元一次方程解与过程