Some answers to your questions!

As you may be asking to yourself why things are like that in algebra, I found a page in which things are very well explained, you can find some exercises as well, so it´s pretty useful.

KhanAcademy

If you´re completely lost in this world and you don´t know where to start, I recommend you to look this page, here, you will have a second chance to learn the basics of algebra.

Algebra for Dummies

Well, as always I hope you find this useful! See you!