The replacement set is 

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

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

\ t \	\ \	\ True or false \
\ 10 \	\ \	\ False \
\ 13 \	\ \	\ False \
\ 17 \	\ \	\ False \
\ 20 \	\ \	\ True \

\

 Since t = 20 makes the equation true, the solution of  is 20.

The solution set is .