Respuesta :
7b - 3(b-1)
7b - 3b - 3(-1) ... distributive property
7b - 3b + 3
(7b - 3b) + 3
(7 - 3)b + 3
4b + 3
----------------
Answer: 4b + 3
7b - 3b - 3(-1) ... distributive property
7b - 3b + 3
(7b - 3b) + 3
(7 - 3)b + 3
4b + 3
----------------
Answer: 4b + 3