解方程组4X+2Y+3Z=1 10X-3y-5z=8
问题描述:
解方程组4X+2Y+3Z=1 10X-3y-5z=8
解方程组4X+2Y+3Z=1
10X-3y-5z=8
18x+2y+6z=-1
答
x-y+4z=-1 (1)4x+2y+3z=17 (2)x+2y+2z=-4 (3)(1)*2+(2)2x-2y+8z+4x+2y+3z=-2+176x+11z=15 (4)(2)-(3)3x+z=21 (5)(4)-(5)*26x+11z-6z-2z=15-429z=-27z=-3代入(5)3x-3=21x=8代入(1)8-y-12=-1y=-3x=8,y=-3,z=-3你的好评...