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Solve the system:
5x - 2y + z = 2
-4x - 2y + 4z = -16
4x + 2y - z = -2

Solve the system: 5x - 2y + z = 2 -4x - 2y + 4z = -16 4x + 2y - z = -2-example-1
User Nerlande
by
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1 Answer

2 votes

Answer:

(0, -4, -6)

Explanation:

5x - 2y + z = 2 Eq. 1

-4x - 2y + 4z = -16 Eq. 2

4x + 2y - z = -2 Eq. 3

Add Eq. 1 and -(Eq. 2):

9x - 3z = 18 Eq. 4

Add Eq. 2 and Eq. 3:

3z = -18

z = -6

Use Eq. 4 and z = -6:

9x - 3(-6) = 18

9x + 18 = 18

9x = 0

x = 0

Use Eq. 1, x = 0, and z = -6:

5x - 2y + z = 2

5(0) - 2y + (-6) = 2

-2y - 6 = 2

-2y = 8

y = -4

Answer: (0, -4, -6)

User Leo Hendry
by
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