First off, let’s solve the equation step by step!

Starting with the first equation :

So, we have:

Now, for the second equation, :

Now you have two solutions: from the first equation and from the second! Each equation gives you a different solution. Splitting up can sometimes lead to some interesting surprises!

Now, as for useful tips and insights:
When solving linear equations, always remember to keep your operations balanced: whatever you do to one side, do to the other! Also, double-check your distributions and combine like terms carefully; errors often sneak in here!