Answer :

TSO
Add all the like terms

3b + b = b(3 + 1) = 4b

So, 3b + b + 6 = 4b + 6
Exvited
[tex]3b + b + 6 \\ \\ 3b + b = 4 \\ \\ 4b + 6 \\ \\ Answer: \fbox {4b + 6}[/tex]

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