19.
x+y=3
2x-y=9
3x+y+2z=1
A:x=2, y=-1, z=-2
20.
2x+3y=-2
4y+2z=-10
3x+5z=1
A: not possible?
21
2x-3y-4z=-21
4x+2y-3z=-14
-3x-4y+2z=-10
A: x= -14.76, y= 9.1, z=-8.95
22.
6x-y-3z=2
-3x+y-3z=1
-2x+3y+z=-6
A: x=-2, y=-15.5, z= .5
23.
2x+y+z=4
4x+3y-2z=21
2x-2y-z=-7
A: not possible?
24.
3x+2y=z-7
5x+3y=-12+2z
2x+3y=-5+z
A: not possible?
2007-12-29 10:28:43 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Number 23 is possible
x = 0.5, y = 5., z = -2
2007-12-29 10:38:42 · answer #1 · answered by hifhif123 2 · 0⤊ 0⤋
19. x = 4, y = -1, z = -5
20. x = 2, y = -2, z = -1
21. x ≅ -14.76, y ≅ 9.1, z ≅ -8.95
Are you sure you copied the second equation correctly? If it is actually
-4x + 2y - 3z = -14
then the solution is x = 2, y = 3, z = 4
22. x = -1/3, y = -2, z = -2/3
23. x = 0.5, y = 5, z = -2
24. x = -2, y = 0, z = 1
2007-12-29 10:37:12 · answer #2 · answered by DWRead 7 · 0⤊ 0⤋
19.
x = 4, y = -1, z = -5
20.
x = 2, y = -2, z = -1
21.
x = -310/21, y = 191/21, z = -188/21
(for Problem 21, your equations may be incorrectly typed resulting in these funky answers)
22.
x = -1/3, y = -2, z = -2/3
23.
x = 1/2, y = 5, z = -2
24.
x = -2, y = 0, z = 1
2007-12-29 10:37:29 · answer #3 · answered by Anonymous · 0⤊ 0⤋
x+y=3 2x-y=9 by adding 3x=12 ,x=4
4+y=3 ,y=-1
in third equation 3(4)+(-1) +z=1, z=-10
x=4 ,y=-1 ,z=-10
2007-12-29 11:24:09 · answer #4 · answered by eissa 3 · 0⤊ 0⤋
https://www.wolframalpha.com/input/
2014-09-12 20:31:47 · answer #5 · answered by Krishnamurthy 7 · 0⤊ 0⤋