Question

PLZ HELP URGENT FOR ME TO GRADUATE

Answer 1

D

Explanation:

First use elimination.

We can eliminate x for this problem.

So we get :

-2y - z = 3

Then, we can multiply the second equation by 3 to eliminate again.

-3x - 3y + 3z = 15

So we get :

-y + 2z = 14

Then, we can multiply equation 4 by 2 to eliminate.

-4y -2z = 6

So we get :

-5y = 20

y = -4

Then, we can plug back in.

4 + 2z = 14

2z = 10

z = 5

x + 4 - 10 = -2

x - 6 = -2

x = 4

(4,-4,5)