1. ## Problems..... Help

26/57=849/5x
Dont know how to do that!^^^^^^^
And...
4x+1/3=x-5/2

2. Originally Posted by peachgal
4x+1/3=x-5/2
is this $\displaystyle \frac {4x + 1}{3} = \frac {x - 5}{2}$ or $\displaystyle 4x + \frac {1}{3} = x - \frac {5}{2}$?

please use parentheses to clarify what you mean

3. Originally Posted by Jhevon
is this $\displaystyle \frac {4x + 1}{3} = \frac {x - 5}{2}$ or $\displaystyle 4x + \frac {1}{3} = x - \frac {5}{2}$?

please use parentheses to clarify what you mean
Now I see how that could be confusing. It is:

$\displaystyle \frac {4x + 1}{3} = \frac {x - 5}{2}$

4. Originally Posted by peachgal
Now I see how that could be confusing. It is:

$\displaystyle \frac {4x + 1}{3} = \frac {x - 5}{2}$
we can cross multiply, do you know how?

we get:

$\displaystyle \frac {4x + 1}{3} = \frac {x - 5}{2}$

$\displaystyle \Rightarrow 3(x - 5) = 2(4x + 1)$

can you continue?

a similar trick can be used for the first, but i wouldn't do it. it's simple enough not to use this trick. remember, our objective is to get x by itself on one side. so whatever is operating on the x, just perform the opposite operation on both sides of the equation to get rid of it

5. Originally Posted by Jhevon
we can cross multiply, do you know how?

we get:

$\displaystyle \frac {4x + 1}{3} = \frac {x - 5}{2}$

$\displaystyle \Rightarrow 3(x - 5) = 2(4x + 1)$

can you continue?

a similar trick can be used for the first, but i wouldn't do it. it's simple enough not to use this trick. remember, our objective is to get x by itself on one side. so whatever is operating on the x, just perform the opposite operation on both sides of the equation to get rid of it
YOU ARE THE BOMB! And really smart.... but I can't figure this one out I cant do algebra with division.

26/57=849/5x

And I tried to solve
$\displaystyle \frac {4x + 1}{3} = \frac {x - 5}{2}$

$\displaystyle \Rightarrow 3(x - 5) = 2(4x + 1)$ but I get to this part and can't continue :

3x-13/8=8x-8

6. Originally Posted by peachgal
YOU ARE THE BOMB! And really smart.... but I can't figure this one out I cant do algebra with division.

26/57=849/5x
well, we can begin by flipping both sides:

$\displaystyle \frac {26}{57} = \frac {849}{5x}$

$\displaystyle \Rightarrow \frac {57}{26} = \frac {5x}{849} = \frac {5}{849}x$

now i want to get to x, but there is a $\displaystyle \frac 5{849}$ multiplying it, so what do i do? i divide both sides by $\displaystyle \frac 5{849}$, thus i obtain:

$\displaystyle x = \frac {57}{26} \cdot \frac {849}{5}$

now simplify

And I tried to solve
$\displaystyle \frac {4x + 1}{3} = \frac {x - 5}{2}$

$\displaystyle \Rightarrow 3(x - 5) = 2(4x + 1)$ but I get to this part and can't continue :

3x-13/8=8x-8
i don't see how you got to that

what exactly are you doing here? explain your process

7. [quote=Jhevon;69944]
Originally Posted by peachgal
YOU ARE THE BOMB! And really smart.... but I can't figure this one out I cant do algebra with division.

26/57=849/5x

well, we can begin by flipping both sides:

$\displaystyle \frac {26}{57} = \frac {849}{5x}$

$\displaystyle \Rightarrow \frac {57}{26} = \frac {5x}{849} = \frac {5}{849}x$

now i want to get to x, but there is a $\displaystyle \frac 5{849}$ multiplying it, so what do i do? i divide both sides by $\displaystyle \frac 5{849}$, thus i obtain:

$\displaystyle x = \frac {57}{26} \cdot \frac {849}{5}$

now simplify

i don't see how you got to that

what exactly are you doing here? explain your process
This is what I did I think I'm wrong
$\displaystyle 3(x-5)=2(4x+1) 3x-15=8x-2 +2 3x-13/8=8x/8$

8. Originally Posted by peachgal

This is what I did I think I'm wrong
$\displaystyle 3(x-5)=2(4x+1) 3x-15=8x-2 +2 3x-13/8=8x/8$
ok, that was even more confusing. you cannot have the equal signs all in line like that. add you can't have lines running into each other, as you clearly have. no wonder you're getting confused

$\displaystyle 3(x - 5) = 2(4x + 1)$ ..........expand the brackets

$\displaystyle \Rightarrow 3x - 15 = 8x + 2$ ...........get all the x's to one side

$\displaystyle \Rightarrow 8x - 3x = -15 - 2$ ........simplify

$\displaystyle \Rightarrow 5x = -17$ .....................divide both sides by 5

$\displaystyle \Rightarrow x = - \frac {17}{5}$

9. Originally Posted by Jhevon
ok, that was even more confusing. you cannot have the equal signs all in line like that. add you can't have lines running into each other, as you clearly have. no wonder you're getting confused

$\displaystyle 3(x - 5) = 2(4x + 1)$ ..........expand the brackets

$\displaystyle \Rightarrow 3x - 15 = 8x + 2$ ...........get all the x's to one side

$\displaystyle \Rightarrow 8x - 3x = -15 - 2$ ........simplify

$\displaystyle \Rightarrow 5x = -17$ .....................divide both sides by 5

$\displaystyle \Rightarrow x = - \frac {17}{5}$
Right on! You are a life savior! May I ask what math you're in now?

10. Originally Posted by peachgal
Right on! You are a life savior! May I ask what math you're in now?
not that it matters here, but i'm in a probability theory course (i'm a complete idiot when it comes to probability, i'm trying to change that) and an advanced calculus course

This is my 35th post!!!!!!!

11. Wow I'm 14 and soon to start algebra 2. Not near as smart as you...

12. Originally Posted by peachgal
Wow I'm 14 and soon to start algebra 2. Not near as smart as you...
i'm not smart, just older. that's the only reason i'm ahead of you