I need a answer for this pre algebra help! b + 3b = 12?

[Milk]

b+3b=12

you have to combine the like terms (the b's.)
so when you add 1b+3b you get 4b
then, you have
4b=12
you divide by 4 on each side to get the b by itself
4b/4=12/4
b=12
there's your answer!

[austin]

please please help me, i need this answer by tomrw.

PROBLEM:::
b + 3b = 12

if you can help, please do. thank you so much!!