The replacement set is

Replace k in  with each value in the replacement set and check

whether the equation is true or not. \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \

\ k \	\ \	\ True or false \
\ 11 \	\ \	\ False \
\ 12 \	\ \	\ False \
\ 13 \	\ \	\ False \
\ 14 \	\ \	\ False \
\ 15 \	\ \	\ True \

\

Since k = 15 makes the equation true, the solution of   is 15.

The solution set is.