Respuesta :

Answer:

6b+37

Step-by-step explanation:

[tex]6b+30+7[/tex]

Since there is a parenthesis, you must get rid of it. You multiply the number in front of the parenthesis and you will get:

[tex]6b+30+7[/tex]

You cannot add a variable and a number, but you can add a number to a number so, you will get the answer

b=12 for the last one