- Thread starter Guest2017
- Start date

- Joined
- Apr 12, 2005

- Messages
- 9,931

They are just numbers. Is the fraction confusing you? Your chosen pathway seems fine. Where do you think it went wrong?

12 - (1/5)r - 2r = 2r + 1 - 2r

12 - r((1/5) + 2) = 2r - 2r + 1

12 - r((1/5) + (10/5)) = (2r - 2r) + 1

12 - r(11/5) = (0) + 1

12 - (11/5)r = 1

Okay, now what?

- Joined
- Dec 30, 2014

- Messages
- 3,526

So please show us the steps you have and which part(s) you do not understand.

-1/5 - 2 = -1/5 - 10/5 = -11/5 so (-1/5)r - 2r = (-1/5 - 10/5)r = (-11/5)r. What do you not understand? I posted this above, if you did not understand it then say exactly what you do not understand. It really makes it easier to help you if we know where you are confused.

- Joined
- Apr 12, 2005

- Messages
- 9,931

You don't have (1/5)r - 2r. You have -(1/5)r + 2r.

12−1/5r=2r+1

I know I need to get r on one side so I would subtract 2r from both sides. How do I subtract 1/5 - 2r? It would help to know in words how to solve the equation. I'm on Khan Academy so I can get hints to find the answer but I don't know how to solve the equation above without help. Thank you hope this is more specific. After I understand how to do that step I will show you the next step I am having difficulty with.

- Joined
- Dec 30, 2014

- Messages
- 3,526

Easier example: -3r - 7r = (-3-7)r = -10r

(-1/5)r-2r = (-1/5 -2)r = (-1/5 - 10/5)r = (-11/5)r. If this is not clear to you, then please explain what you are not understanding.