Hi, I need help here! I am having so much trouble in Algebra III and I know that a lot of you here are very good at solving math problems, so I figured I'd post a couple I am having trouble with and maybe some of you can help me out.

If you can help me solve these, be sure to work the problem out all the way through, no skipping steps or anything. I mean, I need to understand how you got the answer. Thanks a million times if you can help!

1. n - 6/n + 5 = 0

2. 5/6 = 2m/2m + 2 - 1/3m-3

The slashes (/) mean the two numbers are a fraction. Thanks so much if you can help me out!

-Tara

n =1   1-6/1=-5+5=0

Actually not sure that correct, as addition should be taken before subtraction (according to operator precedence) so hence would give 6/n then 6/n + 5, then n - (6/n + 5).

That is how I take it to mean anyway :o I may be wrong.

No. you are right, its nearly midnight and 35 years since I did algebra. I though it looked too easy, and I was so pleased with myself. Butting out now, Sorry :D

1)  n-(6/n)+5=0
multiply by n
have   n^2 + 5n -6 =0
factorise
gives  (n+6)(n-1)=0
so n=1,-6

2)  not sure how it is supposed to be written - isn't entirely clear from your post but

  (5/6)=(2m/2m)+2-(1/3m-3)
2m/2m=1 so have
(5/6)=3-(1/3m-3)
multiply by 3m-3
(5*3(m-1))/6=3(3m-3) -1
will reduce to
5(m-1)/2 = 9m-9-1
5m-5 = 18m -20
15=13m
m=15/13

HTH

n - 6/n + 5 = 0

should read

n - (6 divided by n) + 5 = 0
Therefore
n = 6
because the value of n has to be the same for each n otherwise a different letter would be used to show it meant a different value
so
6 - (6 divided by 6) + 5 = 0  (do the brackets first)
reads
6 - (1 + 5) = 0  (do the brackets first)

I think!! 

On the second question (I haven't done it yet) 2m/2m will equal 1 no matter what the value of m is

n-6/n+5=0
multiple both sides by n+5
(n-6/n+5)n+5=0x(n+5)
n-6=0
n=6

Snap Moonmaiden

OMG, all that has sent me dizzy!  Don't know how you all do it. :D
Dawn.

Me too Dawn, my head is spinning its worse than a foreign language :-(

I am sitting here trying to do a garden design, mixing metric and imperial measurement slabs, and that is doing my head in, so maybe I need some Algebra. lol

I used to have a garden Jayne, slabs, grass, flowers, now I have dogs, Ferrets.............  Good luck with it!
Dawn.

Its not my garden Dawn, I am sure mines just like yours. lol.:-D.

Its what we do I'm a garden designer, but these people want to do it on the cheap, using old slabs mixed in with new ones, and its giving me a headache. lol

God forbid if anyone saw my garden they'd never employ me!!!

:D :D :D LOL
Dawn.

LOLOLOLOL A level pure & applied maths many many years ago

now for the second one lolololol

I wouldn't say that the first one was exactly A level standard tho ' :) (Also Pure and Applied many moons ago :D :D )

Daisy

Should
2 be  5/6 = 2m/(2m + 2) - 1/(3m-3) ?

Goodness knows :D :D  Could be (2m/2m)+2-1 all divided by 3m-3 :) Just shows the importance in algebra of understanding the question :D

Daisy

& getting the brackets in the right place LOLOLOLOL

Could be:

5/6=(2m/2m)+2-(1/3)m-3 in which case

5/6=1+2-(1/3)m-3
5/6=-(1/3)m
(5/6)x-(3/1)=m

m=-15/6

But then again the question might not be right !

Daisy

:rolleyes: Now I remember why I didn't like maths at school!! :D