I’m studying for my Algebra class and need an explanation.

Please do the following exercises, you should follow the instructions carefully. I have uploaded 12.1 and 12.2 for you but for 12.3 I haven’t upload it but you can find it from the textbook below.

**12.1** #1 (a, b, c, d, g), #4 (a-d), #12 (a-e), #15 (a-b)

**12.2** #1 (c, f, h), #4 (a-d), #14

**12.3** #2 (a-d), #11 (a,b), #12 (c)

Name of the Textbook: Reconceptualizing Mathematics for Elementary School Teachers, 3rd Edition by Sowder, Sowder & Nickerson (2017). You should be able to find it online.