# Thread: equation, operator

1. ## equation, operator

Hi!

I have:

a+b = c*d

I want to have a and c on one side and b and d on the other. Can I manage this with some kind of operation?

I'm am very grateful for help.

Kind regards! /Magnus

2. Originally Posted by Magnusc
Hi!

I have:

a+b = c*d

I want to have a and c on one side and b and d on the other. Can I manage this with some kind of operation?

I'm am very grateful for help.

Kind regards! /Magnus
No because both a and b are dependent upon c and d, so there is no way they can be separated. Proof...

$\displaystyle a+b = c*d$

$\displaystyle \frac{a+b}{c}=d$

$\displaystyle \frac{a}{c}+\frac{b}{c}=d$

$\displaystyle \frac{a}{c}=d-\frac{b}{c}$

There is a c on the right side, and there is no way you can get rid of it without having an a on the right side as well.

3. Hi!

I mean some kind of non-arithmetic operator.

Greetings!

4. Thanks a lot for your answer. I'm not sure I understand, yet. Similarily, both b and c are dependent on a and d but they can still be separated. I hope someone can help me understand!

Kind greetings /Magnus