\
The replacement set is 
Replace x in
with each value in the replacement set and
check whether the equation is true or not.
\| \
x \ | \
\
| \
\
True or false \ | \
| \
3 \ | \
\
| \
\
False \ | \
| \
4 \ | \
\
| \
\
True \ | \
| \
5 \ | \
\
| \
\
False \ | \
| \
6 \ | \
\
| \
\
False \ | \
| \
7 \ | \
\
| \
\
False \ | \
Since x =4 makes the equation true, the solution of
is 4.
The solution set is
.