Question

5.Solve:

2x + y - z = 0
x - y + z =6
x + 2y + z = 3

Select the appropriate response
A) x=2 y=-1 z=-3
B) x=-3 y=5 z=2
C) x=2 y=-1 z=3

Help please!

Answer 1

C) x=2 y=-1 z=3

Explanation:

2x + y - z = 0

2(2) + (-1) - (3) = 0

0 = 0

x - y + z =6

2 - (-1) + 3 = 6

6 = 6

x + 2y + z = 3

2 + 2(-1) + 3 = 3

3 = 3