math help

[cindyski]

12x + 6 - 3 (4x - 3) - (6x + 10) = -(4x -3) + 3
tryin to help my daughter with algebra

 

[daniel411]

Originally posted by CindySki
12x + 6 - 3 (4x - 3) - (6x + 10) = -(4x -3) + 3
tryin to help my daughter with algebra
12x +6 -12x +9 -6x -10 = -4x +3 +3
5-6x = 6 -4x
-6x = 1 -4x
-2x = 1
x= - (1/2)

 

[daniel411]

Do you want explanations for the steps?

 

[cindyski]

Originally posted by Daniel411
D
do you want explanations for the steps?

ya, that would be coold

 

[lovethesea]

OMG!! I can't wait for that...........:scared:

What grade is that?
Daniel, you'll be on speed dial.

 

[daniel411]

Originally posted by CindySki
ya, that would be coold
Will do, have to go out for an hour though. Sorry I can't explain sooner, hopefully someone else can chim in, if not when I get back I will.
Originally posted by lovethesea
OMG!! I can't wait for that...........:scared:

What grade is that?
Daniel, you'll be on speed dial.

LOL as long as its on 5-7th grade math, I'll answer the phone! Was helping a co-worker with college calc a few weeks ago, can't believe how much I forgot since hs.

 

[cindyski]

Originally posted by lovethesea
OMG!! I can't wait for that...........:scared:

What grade is that?
Daniel, you'll be on speed dial.

9th and she is making me nuts! i forgot all that stuff, i have no clue!
between daniel an another person i have so far a
x=-(1/2) and
x = 1/2
close but i need a 3rd opinion and an explanation if someone can give one.

 

[aarone]

for those problems just remember the order of operations...
P.E.M.D.A.S (my math teacher is rolling over in her grave right now! )
parenthesis exponents multiply divide add subtract
Just do all in that order and you should get your answer

 

[karajay]

<--- This was not me in math class.
:sleepy: <--- This was!
My daughter is in 8th grade - perhaps I should study :nervous:

 

[tobruk]

i got -1/2, a headeache, and Please Excuse My Dear Aunt Sally running through my head. Ya did check the back of the book right? )

 

[telemachus]

Your original expression can be reduced from:
12x+6 -3(4x-3) –(6x+10) = -(4x-3) +3
to
12x+6-12x+9-6x-10=-4x+3+3
then you get
-6x+5=-4x+6
then
5=2x+6
then
-1=2x
then
x=-1/2

 

[lovethesea]

I am dreading next year. Alegebra. I can't even remeber how to divide decimals. Thats what I set my hair on fire with EVERY stinkin' night!!!! 6th grad next year. So I have Daniel on speed dial for the next 3 years. You did so well with the 9th grade problem, I have promoted you

this is me now

 

[cindyski]

just wanted to thank everyone!
she is having a difficult time and is being very stubborn. i'm worried about her report card

 

[flydan]

Hey,
I've got a 22 year old and an 18 year old senior in high school. You know what they hate? Have them show you their math book, find the chapter they are working on and make them actually "read" the lessons. (You can help.) The exlpanation is more than likely right in front of them but it's easier to have you do the homework for them. Don't get caught in the trap of doing the work. Help them do it.
Been there, done that,
Dan'l

 

[cindyski]

thanks dan
i do try and help her, i wish i understood better myself. she ends up with an attitude and starts yelling. yesterday i gave her several options for resources that would help her and she refused them all. then she pouts and goes to bed.
teenagers

 

[karajay]

You know what they say Cindy -
"Trying to raise teenagers is like trying to nail jello to a tree."

 

[cindyski]

lol, hey her name is Kara

 

[daniel411]

Originally posted by karajay
You know what they say Cindy -
"Trying to raise teenagers is like trying to nail jello to a tree."

LOL, just bribe them!

 

[cindyski]

Originally posted by Daniel411
LOL, just bribe them!
lol i am. i have told her that her drivers permit depends on her grades and attitude etc...
so, at least i wont have a teenage kid on the rd if she dont get it together

 

[beaslbob]

I hope this has been said by someone earlier. This is all you need to know to solve any algebra equation:
What you do to one side you do to the other.
that's basically it. so looking at the first step: multiply everything out so it is all just eingle thingies:
12x + 6 - 3 (4x - 3) - (6x + 10) = -(4x -3) + 3
becomes:
12x + 6 -3*4x -3*-3 -1*6x-1*10=-1*4x-1*-3 +3
or
12x +6 -12x +9 -6x -10 = -4x +3 +3
or
6 +9 -6x -10=-4x +6
-6x+5=-4x+6
(hope that's right)
now applying the above we need the x on the left so add 4x to both sides (the opposite of -4x)
-6x+5=-4x+6
+4x =+4x
-2x+5= 0x+6
now subtract 5 from each side (the opposite of +5)
-2x+5=6
-5=-5
-2x+0=1
now divide wach side by -2 (ooposite of multiplying by -2)
-2x=1
/ -2 =/-2
or
-2x/-2=1/-2
x = -1/2
checking
at least if it is wrong so are all the other answers.
the point is to get the unknown on one side and everything else on the other. you do that be doing the inverse operation (oposite) exactly the same one both sides of the equal side. If you divide on side you divide the other. if you multiply one side you multiply the other. if you add to one you add to the other. and so on and so on until you have just the unkown. then you have the answer.
HTH and not confuses LOL