6. 7 (d - 1) + 2

How to simplify

Answer: 7d-5

Step-by-step explanation:

You multiply 7 by anything inside of the parenthesis so 7 (d) and 7 (-1) after that you group together the similar variables in the equation which in this case is - 7 and 2, so you do - 7 + 2 which equals - 5