To solve, we must do inverse operation.
Do inverse operation and apply to both sides of the equation.
3s+8=29
-8 -8
3s=21
Now we must do the inverse operation of multiplication, which is division.
3s=21
3s/3=21/3
s=7
We are left with s=7
Our final answer s=7
Now we must check our work by plugging the answer into our equation.
3(7)+8=29
21+8=29
CORRECT ANSWER! :P