Question

Calcule o valor de Z
no sistema
x + y + z= 6
x - y - z= -4
2x - y + z= 1

Answer 1

x + y + z = 6

x - y -z = -4

2x - y + z =1

x = -4 -z + 6

-y -z + 6 -y -z = -4

2 (-4-z+6) -4 + z =1

y=5-z

z=11-3y

z=11-3y

z=2