Answer:
4
Step-by-step explanation:
w = 4 units
An integer is a whole number. Two integers are opposite if they have the same distance away from zero. For example,
2 and -2
or
28 and -28
Those are all integers and opposites.
Hope this helps :)
Answer:
For the expression 
k = 9 is the required solution.
Step-by-step explanation:
Here, the given expression is 
Solving the above expression for k, we get:

or, 
or, 
or, k = 9
Hence for the expression 
k = 9 is the required solution.