Question

Resolva o sistema linear escalonado
5x-2y+z=3
4y-z=5
0z=8

Answer 1

5x - 2y + z = 3
4y - z = 5
0z = 8

0z = 8
z = 8/0 = 0 **

4y - z = 6
4y - 0 = 6
4y = 6 + 0
4 y = 6
y + 6/4 = 3/2  = 1,5 ***
5x - 2y + z = 3
5x - 2 (1,5) + 0  = 3
5x -3 + 0 = 3
5x = 3 + 3
5x = 6
x = 6/5 =1,2 ****
PROVA
5X - 2Y + Z =
5( 1,2)  - 2 ( 1,5) = 0 =
6 - 3  = 3
3 = 3  CONFERE