Question

resolva o sistema escalonado

Answer 1

4x - 2y + 3z = 4
6y + 5z =40
2z = 4


2z = 4
z = 4/2
z = 2

6y + 5z = 40
6y + 5.2 = 40
6y + 10 = 40
6y = 40 - 10
6y = 30
y = 30/6
y = 5


4x - 2y + 3z = 4
4x - 2.5 + 3.2 = 4
4x - 10 + 6 = 4
4x = 4 + 10 - 6
4x = 8
x = 8/4
x = 2