Question 25375
Whenever you have an absolute value equal to a positive number, there will be TWO solution.  


As an easy example, consider {{{abs(x) = 5}}}.  The two solutions will be 
x=5 and x= -5.


Likewise, consider {{{abs(y) = 5}}}.  The two solutions will be 
y=5 and y = -5.


Now, consider {{{abs(x-4) = 5}}}.  The two solutions will be 
x-4=5 and x-4=-5.


So, here we go:
{{{ abs (x-4) = 5}}}


There are two solutions:


First Solution:
x-4 = 5 
x-4 +4 = 5+4
x = 9  


Second Solution:
x-4 = -5
x-4 +4 = -5 +4
x=-1


Check: x=9
| x-4 | = 5
|9-4| = 5
5=5


Check:  x=-1
| x-4 | = 5
|-1-4| = 5
5=5


R^2 at SCC