# Thread: Separating variables for an equation?

1. ## Separating variables for an equation?

Did I solve these correctly? For the first one I couldn't seperate I or III, so I think that's right. For the second I'm pretty sure I separated them right but I'm not totally confident about it.

2. ## Re: Separating variables for an equation?

On #6, you still have a function of x on the left-hand side.

- Hollywood

3. ## Re: Separating variables for an equation?

Originally Posted by hollywood
On #6, you still have a function of x on the left-hand side.

- Hollywood
Oh I didn't notice that. Hm, would it be not separable then? Because dividing e^-x from both sides does give me any of those answers, right?

4. ## Re: Separating variables for an equation?

If you divide both sides by $e^{-x}$ (or multiply by $e^x$), you get answer #2.

- Hollywood

5. ## Re: Separating variables for an equation?

Originally Posted by hollywood
If you divide both sides by $e^{-x}$ (or multiply by $e^x$), you get answer #2.

- Hollywood
Okay. Thanks! I didn't know that was how you divided by e^-x. Good to know!