Question

first, combine like terms.
$3b + 4 + 10 + 6b - 2 = \square b + \boxed{?}$

Explanation:

Step1: Combine terms with $b$

$3b + 6b = (3+6)b = 9b$

Step2: Combine constant terms

$4 + 10 - 2 = 14 - 2 = 12$

Answer:

$3b + 4 + 10 + 6b - 2 = 9b + 12$
The blanks are 9 and 12 respectively.