Question

Solve the System. Give your answer as (X,Y,Z)
-5x-4y-4z=9
-6x+5y-2z=-15
-2x-3y-2z=13

Please i need help

Answer 1

subtract the third equation from the second, which will give
\[-4x+8y=-28\]

Answer 2

then multiply the third equation by \(-2\) and add to the first equation
you get
\[-5x-4y-4z=9\]\[4x+6y+4z=-23\] add and get
\[-x+2y=14\]

Answer 3

now you can solve the system
\[-x+2y=14\]\[-4x+8y=28\]

Answer 4

hmmm

Answer 5

yea i got stuck there i divide the bottom by -4

Answer 6

yeah i guess this does not have a solution

Answer 7

- 5x _ 4y - 4z = 9 -->(5)-5x - 4y - 4z = 9
-6x + 5y - 2z = - 15 ->(4)-6x + 5y - 2z = - 15
--------------------
-25x - 20y - 20z = 45 (result of multiplying by 5)
- 24x + 20y - 8z = - 60 (result of multiplying by 4)
--------------------add
- 49x - 28z = - 15

-6x + 5y - 2z = - 15 -->(3)-6x + 5y - 2z = - 15
-2x - 3y - 2z = 13--> (5)-2x - 3y - 2z = 13
----------------------
-18x + 15y - 6z = - 45 (result of multiplying by 3)
-10x - 15y - 10z = 65
----------------------add
- 28z - 16z = - 20

- 28x - 16z = - 20 -->(7)-28x - 16z = - 20
-49x - 28z = - 15 -->(-4)-49x - 28z = - 15
---------------------
- 196x - 112z = - 140 (result of multiplying by 7)
196x + 112z = 60
---------------------add
0 + 0 = - 80

your right satellite73......no solution :)