$\"\"$

The replacement set is $\"\"$

The equation is $\"\"$

Replace b in $\"\"$ with each value in the replacement set and check

whether the equation is true or not. \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \
\
b
\ \
$\"\"$
\ \
True or False
\
\
12
\ \
$\"\"$
\ \
False
\
\
17
\ \
$\"\"$
\ \
False
\
\
18
\ \
$\"\"$
\ \
False
\
\
21
\ \
$\"\"$
\ \
True
\
\
25
\ \
$\"\"$
\ \
False
\
\

Since b =21 makes the equation true, the solution of $\"\"$ is 21. $\"\"$

The solution set is $\"\"$ .

\ b \	\ $\"\"$ \	\ True or False \
\ 12 \	\ $\"\"$ \	\ False \
\ 17 \	\ $\"\"$ \	\ False \
\ 18 \	\ $\"\"$ \	\ False \
\ 21 \	\ $\"\"$ \	\ True \
\ 25 \	\ $\"\"$ \	\ False \