The answer you seek happens to be the first one, A.
2x-8y////2r+5+3r-s+11=5r+16-s////-7x+7
Answer:
Step-by-step explanation:
The original distance that Angel wanted to walk will be represented as A
Since we don't know the additional distance Angel walked it'll be represented as B
A= the amount of distance Angel wanted to walk
B= the amount of distance Angel wanted to walk past his/her challenge goal
C= the amount of distance Angel walked originally from to past her/his challenge goal
A+B=C
Example:
I decide to work for A hours today as a challenge. Within this time I'm working I decided to extend my goal another B hours.

Solution:
Given expression:

To solve the given expression:
First simplify: 

Cancel the common factor (w + 5).

Now substitute this in the given expression.

Multiply the fractions 

Factor the denominator 
Cancel the common factor 2(w – 5).

Factor the numerator 

Cancel the common factor (w – 2).


I believe the word you are looking for is variable. variable is the word used when talking about a value of x in an equation.