Answer:
The answer to your question is:
x = 3
y = 6
z = - 1
Step-by-step explanation:
- x - y - z = - 8 (I)
- 4x + 4y + 5z = 7 (II)
2x + 2z = 4 (III)
2z = 4 - 2x
z = 2 - x (IIIA)
Substitute IIIA in I
- x - y - (2 - x) = - 8 - x - y - 2 + x = -8 - y - 2 = -8 - y = -8 + 2 y = 6
Substitute IIIA and y in II
- 4x + 4(6) + 5(2 - x) = 7
-4x + 24 + 10 - 5x = 7
-9x = 7 -34
-9x = -27
x = 3
Substitute x in IIIA
z = 2 - 3
z = - 1
