Question

1} resolva os sistemas
a] x + y + z = 3
y + z = 10
z = - 1

b] 2 x + 3 y + 4 z = 15
2 x - 2z = 10
3 z = 0

c] x + y = 0
- x - y = -1

Answer 1

a) x=-7
y=11

b) z=0
x=5
y=3/5