Final answer:
The simplified expression is 2b + 2c.
Step-by-step explanation:
To simplify the expression b + b + 2c, we combine like terms.
In this case, the like terms are the two b terms and the two c terms.
Adding the b terms gives us 2b, and adding the c terms gives us 2c.
Therefore, the simplified expression is 2b + 2c.