Răspuns :

[tex]x+y=162 \\ y+z=354 \\ x+z=408\ \ adunam\ \ cele\ \ trei\ \ relatii \\ \\ 2x+2y+2z=924 \ \ / :2=>x+y+z=462 \\ \\ 162+z=462 \\ z=462-162 \\ z=300 \\ \\ x+354=462 \\ x=462-354 \\ x=108 \\ \\ 108+y=162 \\ y=54[/tex]