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Algebra help and explanation plz?
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Topic: Algebra help and explanation plz? (Read 44 times)
JOEJHONJEAN
Posts: 1
Algebra help and explanation plz?
«
on:
July 04, 2008, 06:20:00 PM »
well i'm in summer school for algebra although i don't have to take it it's just if i did'nt take it i'm stuck for 2 period algebra:( see i get a test every day and my teacher is stubborn it's mostly a alone class work stuff and well if any one can help me thank's i'm not that good at math but at every other subject i am but what i hate about math that you can be good at the other sub's but math bad in that it make's you look like a D.AZZ i hate that:(
so if you can explain the following problem and how to solov similar problems thanks 3x+3=2(x-3) 2. 6x-2=2(2x+4) i mean that's easy stuff but i have bad idc teach's so yeah if any one can help with explaining problems like this thank you *don't rub it in plz*
ok the problems go as following srry for the mishaps 3x+3=2(x-3) and no. 2. is 4x+6=2(3x-4)
sorry about that
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LucyD
Posts: 1
Algebra help and explanation plz?
«
Reply #1 on:
July 06, 2008, 02:22:24 PM »
either you posted the questions way too close together or it's one long weird problem.
but either way if you need help you can email me the problems and I'd be glad to help you I'm pretty good at math =) (not rubbing it in)
my email address is:
babygrl1401@yahoo.com
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Merecedeslove
Posts: 1
Algebra help and explanation plz?
«
Reply #2 on:
July 08, 2008, 10:24:48 AM »
Are these two different problems? Are you trying to solve for x? If they are two seperate ones and you are solving for x. First, multiply 2(x-3) to get 3x+3=2x-6 then, you can get the xs to the same side. so, subtrack from the right and add to the left. 3x+3+2x=2x-6-2x so, you have 5x+3=-6 then subtract the 3 from the left and add to the right... 5x =-3 Finally, x= -3/5
If they are somehow one problem and you need more help please explain more in your quesiton.
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MissKay
Posts: 1
Algebra help and explanation plz?
«
Reply #3 on:
July 10, 2008, 06:27:12 AM »
Don't worry about it. When I took algebra, my class was ahead of the game, so my teacher always expected us to understand it without much explanation.
If you need help, there are a lot of good websites you can find through google.
But to answer you more specifically:
3x + 3 = 2(x - 3)
What you want to do is keep your equation balanced while trying to solve for x. For this one, I'd start by dividing both sides by 2:
(3x)/2 + 3/2 = (x - 3)
Then, subtract 3/2 from both sides(when subtracting, make sure not to combine unlike terms. For example, don't subtract 3/2 from x):
(3x)/2 = x - 9/2
Subtract x from both sides:
x/2 = -9/2
Now, you want x to be in it's simplest form, so you multiply both sides by 2:
x = -9
6x - 2 = 2(2x + 4)
Divide both sides by 2:
3x - 1 = 2x + 4
Subtract 2x from both sides:
x - 1 = 4
Add 1 to both sides:
x = 5
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sunnyday
Posts: 1
Algebra help and explanation plz?
«
Reply #4 on:
July 12, 2008, 02:29:36 AM »
Are the problems you are asking for explanations on
3x+3=2(x-3)
and
6x-2=2(2x+4)?
Assuming so, in both equations they are saying that
3x+3 will equal the same number as 2(x-3).
The same goes for the second equation.
Therefore, you know that if you join like terms, you can find what both sides of the equations equal.
To do so, first multiply out the sides of the equations with parenthesis.
For the first equation:
3x+3=2x-6 b/c you multiply the two by everything in parenthesis.
For the second equation:
6x-2=4x+8
Now you want to get the x's on one side of the equal sign and the constant on the other side.
To do this, you must make the terms in the equation cancel out.
For the first equation:
3x+3=2x-6 -so first handle the x terms
-3x -3x -subtract 3x from the left side to cancel it out (making it equal zero on the left. Once you do that, you must do the same to the other side. So subtract 3x on the right as well.
After doing this, you get 3=-x-6 b/c 2-3 leaves one negative.
Now lets handle the constant:
3=-x-6
+6 +6 -do the same thing as you did above with the constant. Then you get,
9=-x -now divide the 9 by the term in front of the variable.
9/-1 which equals -9 so x=-9
Now you have completed the first equation. Do the same for the second one.
Second Equation:
6x-2=4x+8
-6x -6x
so you get
-2=-2x+8
-8 -8 -b/c you add like terms.
which equals
-10=-2x
so dividing -10 by -2 you find that x equals 5
I hope that helps, and if you need any further explanation, please feel free to ask.
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