Răspuns :
Salutare!
[tex]\bf x + 577 = 867[/tex]
[tex]\bf x = 867-577[/tex]
[tex]\boxed{\bf x = 290}[/tex]
[tex]\it Verificare:[/tex]
[tex]\it 290 + 577 = 867\:\:(adevarat)[/tex]
==pav38==
Salutare!
[tex]\bf x + 577 = 867[/tex]
[tex]\bf x = 867-577[/tex]
[tex]\boxed{\bf x = 290}[/tex]
[tex]\it Verificare:[/tex]
[tex]\it 290 + 577 = 867\:\:(adevarat)[/tex]
==pav38==