Sanahaseeb25 Sanahaseeb25

24-07-2020
Mathematics

contestada

What is the solution to the system of equations?
(x + 4y – z = 5
3x – 2y + 2z = 7
2x – z= -2

Respuesta :

valerieulbrich valerieulbrich

24-07-2020

Answer:

x = 1, y = 2, z = 4

Step-by-step explanation:

(x + 4y – z = 5

2(3x – 2y + 2z = 7 )

6x - 4y + 4z = 14

7x + 3z = 19

3(2x – z= -2)

6x - 3z = -6

13x = 13

x = 1

6(1) - 3z = -6

-3z = -12

z = 4

(1) + 4y - 4 = 5

4y = 8

y = 2

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