C - 7.6 = -4
c = -4 + 7.6
c = 3.6
13 because you do 18-8 and you get 10 and divide that by 2 and you get 5 then add 5 to 8 and you get 13 and subtract 5 from 18 and you get 13 as well. Hope that helps
For this case we have the following inequality:

To solve we have:
Subtracting 6 from both sides of the equation:

Thus, the solution is given by all values of r greater than or equal to 5.
Answer:
The solution is given by all values of r greater than or equal to 5.