The expression
$\,2x + 1\,$
represents the sequence of operations
‘take a number, multiply by
$\,2\,$, then add $\,1\,$’.
The expression
$\,2(x+1)\,$
represents the sequence of operations
‘take a number, add
$\,1\,$, then multiply by
$\,2\,$’.
(Of course, a variable other than $\,x\,$ can be used.)
CONCEPT QUESTIONS EXERCISE:
On this exercise, you will not key in your answer.However, you can check to see if your answer is correct. 
PROBLEM TYPES:
