# Math Help - cryptic Algebra proof

1. ## cryptic Algebra proof

Can someone help me solve this one?

$
\frac{10a-5b}{5b-10a}
$

PLZZZZ!!!

2. Originally Posted by hkerbest
Can someone help me solve this one?

$
\frac{10a-5b}{5b-10a}
$

PLZZZZ!!!
That is not an equation, so you can't solve for anything.

Do you mean to "simplify" this one? If so, you say:
$\frac{10a-5b}{5b-10a} = \frac{10a-5b}{-(10a-5b)} = -1$

3. ## Algebra

Hello hkerbest
Originally Posted by hkerbest
Can someone help me solve this one?

$
\frac{10a-5b}{5b-10a}
$

PLZZZZ!!!
What you need to notice is that if you multiply $(5b-10a)$ by $-1$ you get $(10a-5b)$. Can you see why?

So $\frac{10a-5b}{5b-10a}=\frac{-(5b-10a)}{5b-10a} = -1$