Question

D)x-y+z-w=0
Y+z+w=5
-z-2w=1
-w=2

Answer 1

Explicação passo-a-passo:

- w= 2

w= -2

- z -2w= 1

- z- 2.(-2)= 1

- z+4= 1

- z = 1-4

- z= -3

z= 3

y + z +w= 5

y+ 3 +(-2)=5

y+3-2=5

y+1=5

y= 5-1

y=4

x - y + z - w=0

x - 4 + 3 - (-2)=0

x -4+3+2=0

x -4 +5=0

x+1=0

x= -1