Question

resolva o sistema linear
2x+3y+z=11
x+y+z=6
5x+2y+3x=18

Answer 1

1º{2x+3y+z=11
2º{x+y+z=6/.(-1)
3º{5x+2y+3x=18

1º{2x+3y+z=11
2º{-x-y-z=-6
*{x+2y=5/. (-1)
*{-x-2y=-5
3º{8x+2y=18
"{7x=13

"{x=13/7

*{x+2y=5/.(-8)
*{-8x-16y=-40
3º{8x+2y=18
'{-14y=-22/.(-1)
'{11y=22
'{y=22/14

'{y=11/7

2º{x+y+z=6
//{13/7+11/7+z=6
//{24/7+z=6
//{z=6-24/7

2º{z=18/7

Espero ter ajudado!