x-3y+2z=1 (1)
2x+2y-3z=-10 (2)
4x-8y+5z=6 (3)
(1)×2+(2)×3
8x-5z=-28 (4)
(2)×4+(3)
12x-7z=-34 (5)
(5)×5-(4)×7
60x-56x=-170+196
4x=26
所以
x=13/2
z=)12x+34)/7=16
y=(x+2z-1)/3=25/2
x-3y+2z=1 2x+2y-3z=-10 4x-8y+5z=6
3个回答
相关问题
-
2X+Y+Z=10,X+2Y+Z=-6,X+Y+2Z=8 5X+4Y-3Y=13,2X-3Y+7Z=19,3X-Y=2X
-
(1)3x+4y=15 2y-z=2 x+2z=9 (2) x+y+z=8 2x+3y-z=6 3x-y+z=8 (3)
-
2x+3y+z=8 4x-y-z=10 x+2y-z=1
-
解三元一次方程组：(1)x+2y+3z=11x-y+4z=10x+3y+2z=2(2)x:y=3:5y:z=5:6x+y
-
x+y+z=-1 4x-2y+3z=5 y-z=8-2x
-
2x-y=7 x+y+z=25x+3y+z=2 x-2y+z=-1 3x-4z=4 x+2y+3z=-1x+y-z=6x
-
x+y+2z=5 2x-y-z=4 3x+y-3z=10
-
9x+4y+z=10 {-9x+2y+3z=-6 3x-4y+2z=5
-
帮忙解三元一次方程,x+y=8,x+y+z=10,x-y-z=6x+y=3,y+z=-4,z+x=5y=2x-4,3x+
-
2x+y+3z=5 3x-2y-z=6 4x-3y+2z=4