Respuesta :

[tex](3s-4)+(s+3)[/tex]  

Remove brackets 

[tex]3s-4+s+3[/tex] 

Collect like terms

[tex](3s+s)-4+3[/tex] 

[tex]4s-4+3[/tex] 

[tex]4s+(-4+3)[/tex] 

[tex]4s-1 = simplified \ solution [/tex]