解三元1次方程{2x+3y+z=﹣15 3x+y+2z=﹣9 x+2y+3z=﹣12
解三元1次方程{2x+3y+z=﹣15 3x+y+2z=﹣9 x+2y+3z=﹣12
三元-次方程2y-x+3z=114z-x-y=103y+2z-x=2
解三元一次方程组:x-2y=﹣9,y-z=3,z+x=47
解三元一次方程组x:y:z=1:2:3 x+y+z=36
解三元一次方程:x+y-z=0,2x+y+z=7,x-3y+z=8
求用矩阵解三元方程x+y-z=3-z+y+2x=42y+z+2x-12=0suppose inverse of the
解三元一次方程组:{x+y+z=4 2x+y+3z=9 x+3y+2z=14 {3x+y-z=7 x+2y+2z=12
三元一次方程组(1)x-2y=-9 y-z=3 2z+x=47 (2)3x-y+z=4 2x+3y-z=12 x+y+z
解三元一次方程组 {2x+y+3z=1 y-2z=4 3x+y=9 {2x+y+z=9 y-2z=-12 3x+y=7
解三元一次方程组:x+y+z=6,y-z=4,x-y-2z=3,
3元1次方程x-2y=-9 3x-y+z=4{ y-z=3 { 2x+3y-z=122z+x=47 x+y+z=6
三元一次方程组数学题x+2y+2z=33x+y-2z=72x+3y-2z=10x-y=2z-x=3y+z=-1x-y-z