# Help needed with some equations and bedmas

• Sep 13th 2011, 11:31 PM
Graem
Help needed with some equations and bedmas
Hey jsut need a quick reminder on some Equations like for this question.
x-3----x
___ +__ = 6
2-------3

Now i know you have to find the common denominator in this equation, which I believe is 6. so it should be.

3x-9 + 2x = ?

Does the 6 need to be change? if so how? I cant remember.

Plus if you can also help me with this bedmas problem as well.

-(-2)+2/[-2(-1)]

I know I have to do the brackets first so -2x-1 is 1
I believe you do that one first, im just not sure what the - at the left most area of the problem is used for?

If you wandering im doing college math at the moment and its been quiet a while sinced I did math. If you can help me with this I be so happy right now.
• Sep 14th 2011, 12:11 AM
Graem
Re: Hey need help with some equations and bedmas
Okay, I think I figured the equation problem. You multiply the 6 with the lowest common denominator which is 6x6. Than you move the -9 to the right side of the =. Thus making it look like this

3x+2x=36+9

than you combine.

5x=45

divide

5x--45
__=__
5----5

thus x=9

• Sep 14th 2011, 12:35 AM
Siron
Re: Hey need help with some equations and bedmas
Yes, $x=9$ is correct.
$\frac{x-3}{2}+\frac{x}{3}=6$
$\Leftrightarrow \frac{3(x-3)+2x}{6}=6$
$\Leftrightarrow 3(x-3)+2x=36$
$\Leftrightarrow 3x-9+2x=36$
$\Leftrightarrow 5x=45$
$\Leftrightarrow x=9$
• Sep 14th 2011, 12:36 AM
Graem
Re: Hey need help with some equations and bedmas
Thank you, can you help me with the bedmas problem?
• Sep 14th 2011, 12:40 AM
Siron
Re: Hey need help with some equations and bedmas
You have:
$\frac{-(-2)+2}{-2(-1)}$
Indeed first the brackets (notice --=+), therefore:
$\frac{2+2}{2}$
Therefore we get:
$\frac{4}{2}=2$
• Sep 14th 2011, 01:18 AM
Graem
Re: Hey need help with some equations and bedmas
Quote:

Originally Posted by Siron
You have:
$\frac{-(-2)+2}{-2(-1)}$
Indeed first the brackets (notice --=+), therefore:
$\frac{2+2}{2}$
Therefore we get:
$\frac{4}{2}=2$

Okay I see now thank you so much!