Clearing the fraction is a very useful technique to make many problems much easier. but it is not the only way to do problems with fraction. The way you did #3 is perfectly fine and just as easy as clearing the fraction. I'm glad that you have the skill to do a problem more than one way - way to go!
On problem 3, out of habit I subtracted the 5 and multiplied by -2, instead of clearing the fraction. I still got the same answer, but should I clear the fraction instead?
