I personally understand what you are saying... everyone has a teacher like that at least once in their schooling. 
Doing two-step equations can sometimes be tricky, even if you understand the topic pretty well. All two-step equations are: equations that require two objectives to solve for the variable (That's why it's called a <em>two-step </em>equation).
There are multi-step equations...but let's take one bite at a time.
First, let's establish one simple rule:
Anything you do to one side of the algebraic equation, you must do to the other side for the equation to remain true.
For example:

So, we have this  just chillin' out with the
 just chillin' out with the  . When trying to solve for a variable, this is usually not what we want. The
. When trying to solve for a variable, this is usually not what we want. The  needs to be alone for us to know what
 needs to be alone for us to know what  equals.
 equals. 
For the first step of getting  alone, we can add
 alone, we can add  on each side of the equation to cancel out the
 on each side of the equation to cancel out the  on the variable's side. Remember to do it on both sides of the equation!
 on the variable's side. Remember to do it on both sides of the equation!
 becomes
 becomes 
Did you see what I did there? All I did was basically add  to
 to  and
 and  . The equation remains equal, but using that simple rule, we were able to get one step closer to isolating the
. The equation remains equal, but using that simple rule, we were able to get one step closer to isolating the  in the equation.
 in the equation.
To continue...

 turns into
 turns into  <em>(This is because the
 <em>(This is because the  and the
 and the  cancel out.)</em>
 cancel out.)</em>
Now we have 
This next step should look familiar to you (assuming you already know how to solve for one-step equations, I'll keep it short and sweet).

Now, since  is the same as saying
 is the same as saying  times
 times  , we can do the opposite of multiplication...which is <em>division, </em>like so:
, we can do the opposite of multiplication...which is <em>division, </em>like so:

The  's will cancel each other out and
's will cancel each other out and  simplifies to
 simplifies to  .
.
Awesome! Looks like we solved our two-step equation! 
In the equation:  ,
 , 
Some things to remember:
- What ever you do to one side of the equation, you must do to the other.
- You want to apply the opposite sign of the number you are trying to cancel out of the equation while isolating the  . .
- Never make it harder than it needs to be. It is called a two-step equation for a reason, multi-step requires more than two...but wait until you have to work those before you start using fifty different ways to solve the equation.
Hope I was able to help you out! Have a good one, and God bless!
<em>Also, if you are confused about something I answered, or I may be incorrect, feel free to let me know!</em>