1705326 1705326

17-09-2021
Mathematics

contestada

Solve the system by substitution.
2x - y + z = -4
z = 5
-2x + 3y - z = -10

A. (–8, 7, 5)
B. (–8, –7, 5)
C. (8, –7, 5)
D. (–8, –7, –5)

Respuesta :

mudathir1200 mudathir1200

17-09-2021

Answer:

B.(-8, -7, 5)

Step-by-step explanation:

2x-y+5=-4

-2x+3y-5=-10

by adding up both equations

2y=-14

y=-7

2x+7+5=-4

2x+12=-4

2x=-16

x=-8

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