Question

3. Solve:

2x + y + z = 1
x – y + 4z = 0
x + 2y – 2z = 3
Select the appropriate response

A) x=-3 y=5 z=2
B) x=2 y=-1 z=3
C) x=2 y=-1 z=3

Help Please!

Answer 1

A) x=-3 y=5 z=2

Explanation:

2x + y + z = 1

2(-3) + (5) + (2) = 1

1 = 1

x - y + 4z = 0

-3 - (5) + 4(2) = 0

0 = 0

x + 2y - 2z = 3

-3 + 2(5) -2(2) = 3

3 = 3