Question

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)

Answer 1

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