Given: x - 7 > - 2. Choose the solution set. a x R, x > - 9 b x c x d x R, x > 14

c (x R, x > 5)

Explanation:

R is a set of all real numbers.

Given x - 7 > - 2

Adding 7 to both sides of the inequality,

x - 7 + 7 > - 2 + 7

x > - 2 + 7

x > 5

Therefore x > 5 gives the set expression x = { 6, 7, 8, 9, ... }, whose elements are all subset of R.