x-4z=-1
5x+z=0
2006-08-20 17:32:02 · 11 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
x-4z=-1
x=4z-1------1
5x+z=0
5x=-z
x=-z/5-------2
1-->2
4z-1=-z/5
20z-5=-z
21z=5
z=5/21
when z=5/21
x-4z=-1
x=4z-1
x=4(5/21)-1
x=20/21-21/21
x=-1/21
x=-1/21, z=5/21
2006-08-20 17:42:52 · answer #1 · answered by Marushka 2 · 0⤊ 0⤋
x-4z = -1 and 5x + z = 0 => x-4z = -1 and 20 x + 4z = 0 => 21x = -1 OR x= -1/21. Substituting, => -1/21 - 4z = -1 => 4z = 20/21 OR z = 5/21.
2006-08-21 01:12:41 · answer #2 · answered by flyfisher_20750 3 · 0⤊ 0⤋
x - 4z = -1
5x + z = 0
x - 4z = -1
x = 4z - 1
5(4z - 1) + z = 0
20z - 5 + z = 0
21z - 5 = 0
21z = 5
z = (5/21)
x = 4(5/21) - 1
x = (20/21) - 1
x = (20/21) - (21/21)
x = (-1/21)
x = (-1/21)
z = (5/21)
2006-08-21 11:49:31 · answer #3 · answered by Sherman81 6 · 0⤊ 0⤋
z = 5/21 and x=-1/21
2006-08-21 00:46:47 · answer #4 · answered by whodroppedthepotato 2 · 0⤊ 0⤋
x-4z=-1
x=3z
Substitute 3z for x in 2nd equation
5(3z)+z=0
15z+z=0
16z=0
0 divided by 16 =0
So then plug in 0 for z in the first equation
z=0
x=-1
2006-08-21 00:40:44 · answer #5 · answered by A Fire Within 2 · 0⤊ 0⤋
x = -1/21, z = 5/21
2006-08-21 00:45:06 · answer #6 · answered by lovely 1 · 0⤊ 0⤋
sub eq1 into 2,
5(4z-1) + z = 0
21z - 5 = 0
z = 5/21
2006-08-21 00:40:43 · answer #7 · answered by ThoughTs 2 · 0⤊ 0⤋
5x - 20z = -5
5x + z = 0
-19z = -5
z = 5/19
5x + (5/19) = 0
5x = -5/19
x = -1/19
2006-08-21 00:57:42 · answer #8 · answered by jimbob 6 · 0⤊ 0⤋
x = 2 points for me
z = 10 points for me
2006-08-21 00:37:18 · answer #9 · answered by Bedroom Celebrity 3 · 1⤊ 1⤋
z=-5x
x-4(-5x)=1
21x=1
x=1/21
now u find the value of z
2006-08-21 00:40:06 · answer #10 · answered by hsarora47 4 · 0⤊ 1⤋