The variable a and b are already definited in the part of the code you shouldn’t modify.
Also the challenge is asking you this:
Assign the value
7 to variable
Assign the contents of
a to variable
You shouldn’t reassign anything to b except for the value of a (pay attention on who is getting a new value).
Also, on the left of the = sign (assignment operator) you have the variable that receives the new value.
On the right of the = sign you have something (a variable in this case, but it could also be an expression) that gets translated into a value to be passed on whatever there is on the left of the =.