Homework help question: 2x-1/1-2x = -1 why?

[xsgx]

Why does 2x-1/1-2x equal negative one?Can someone explain this to me because i don't get it.

 

[berkeman]

Why does 2x-1/1-2x equal negative one?Can someone explain this to me because i don't get it.

Because -1 * (2x-1) = -2x+1 = (1-2x)

Does that help?

 

[Mark44]

Why does 2x-1/1-2x equal negative one?Can someone explain this to me because i don't get it.

This probably doesn't mean what you actually wrote, but it turns out to be equal to -1 anyway. Here's what you wrote:
$$2x - \frac{1}{1} - 2x = 2x - 1 - 2x = -1$$

If you want what you write to be interpreted the way you mean it, use parentheses, as in (2x - 1)/(1 - 2x).

 

[berkeman]

This probably doesn't mean what you actually wrote, but it turns out to be equal to -1 anyway. Here's what you wrote:
$$2x - \frac{1}{1} - 2x = 2x - 1 - 2x = -1$$

Hah! Good eye!

 

[xsgx]

This probably doesn't mean what you actually wrote, but it turns out to be equal to -1 anyway. Here's what you wrote:
$$2x - \frac{1}{1} - 2x = 2x - 1 - 2x = -1$$

If you want what you write to be interpreted the way you mean it, use parentheses, as in (2x - 1)/(1 - 2x).

Yeah i meant (2x-1)/(1-2x)

 

[xsgx]

Because -1 * (2x-1) = -2x+1 = (1-2x)

Does that help?

Yeah that helps.Thank you.