解方程x+y+z=2,3x-y-4z=5 ,2x+3y-2z=0
问题描述：
解方程x+y+z=2,3x-y-4z=5 ,2x+3y-2z=0
要过程的.O(∩_∩)O谢谢!
答
x+y+z=2 (1)3x-y-4z=5 (2)2x+3y-2z=0 (3)(1)+(2)得4x-3z=7 (4)(1)*3-(3)得3x+3y+3z-2x-3y+2z=6-0x+5z=6 (5）(4)*5+(5)*3得5(4x-3z)+3(x+5z)=7*5+6*323x=53x=53/235z=6-xz=17/23y=2-x-z=-24/23所以x=53/23 y=-24/23 z...