Question

Solve the following system of equations.

x + 3y - z = 2
x - 2y + 3z = 7
x + 2y - 5z = -21

(2, 3, 5)

(-2, 3, 5)

(2, -3, 5)

(2, 3, -5)

Answer 1

1. Subtract the second equation from the first equation. That will eliminate x
2. Subtract the third equation from the second equation. That will eliminate x again.
3. Now you have two equations that contain only y and z.
4. Solve that system.

Answer 2

ughhh

Answer 3

Well in lieu of that, you could takes each answer choice, plug it into each equation. The answer that makes all three equations true is the answer to the question.

Answer 4

x = -2 y =3 z =5

Answer 5

yes. Good job.