1. Solve the Following equation:

Question

3(x-7)-x=2x-21
a. 7
b. -2
c. infinitely many solutions
d. no solution

2. Solve the Following equation:
4=2y=9+2y
a. 4
b. -4
c. infinitely many solutions
d. no solution

Can someone walk me through how to do these please? I don't understand it the way the textbook shows it.

Answer 1

3(x-7)-x=2x-21

3x - 21 - x = 2x - 21

2x - 2x = 21 - 21

0 = 0

Is there a typo in problem 2?

Answer 2

Oh, Uhm. Yes, Ms. Sue. It's supposed to be 4+2y not 4=2y.

Answer 3

4+2y=9+2y

0 = 5

No solution

Answer 4

so is the first one infinite, Ms. Sue?

Answer 5

Yes. Many solutions

Answer 6

Thanks Mrs. Sue!

Answer 7

You're welcome, Vae.

Answer 8

Thank you for every other person that kept their mouth shut and didn't put opinions about me.