Algebra homework help needed..

Jonboy99

11/04/2007 at 21:42

Aargh, this is doing my head in. I know the answer, but can't do the working, and without the working I won't remember it for longer than about 5minutes.
I'll try and post a bike question later to make up for this thread

Anyway:

ab=(a-c)d

How do I rearrange it to give the answer in terms of c/a ?

I know the answer is

c/a=(d-b)/d

but I can't work out the steps on my own. I feel like i'm 15 again and the thought of not being able to ride a bike on the road for 2 years makes me feel

Can anyone do the working showing each rearrangement of the equation?

Ta

blessmycg

11/04/2007 at 21:53

Jonboy99 wrote

but I can't work out the steps on my own ... and the thought of not being able to ride a bike on the road for 2 years makes me feel

Wow, that compulsory re-test is a bastard, isn't it?

sorry, I could've done this anywhere from 4 to 7 years ago, but I very specifically un-learnt it after spectacularly failing my maths modules at uni.

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CB-1 current condition / mods.

trogggy

11/04/2007 at 21:54

ab= (a-c)d

ab=ad-cd

cd=ad-ab

cd=a(d-b)

c=a(d-b)/d

c/a=(d-b)/d

Whassitfor?

banana boy

11/04/2007 at 21:58

ab=(a-c)d

ab/d=(a-c)

b/d = (a-c)/a

b/d = 1 -c/a

... err ...

c/a=(d-b)/d

Merry Christmas

Olly

11/04/2007 at 21:59

ab = (a-c)d

(ab)/d = a - c

b/d = 1 - c/a

c/a = 1 - (b/d)

c/a = (d-b)/d

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blessmycg

11/04/2007 at 21:59

banana boy wrote

ab=(a-c)d

ab=(a-c)
d

b = a-c
d a

b = 1 -c
d a

... err ...

c/a=(d-b)/d

[u]Honda CB-1 owners' forum[/u]

CB-1 for sale
CB-1 current condition / mods.

Summerleft

11/04/2007 at 22:12

That made a memory flood back of a friend at school who used to call it hold-ya-bra

ha, school days LOL

Jonboy99

12/04/2007 at 16:37

trogggy wrote

ab= (a-c)d

ab=ad-cd

cd=ad-ab

cd=a(d-b)

c=a(d-b)/d

c/a=(d-b)/d

Whassitfor?

Cheers mate

I got about as far as banana boy..

I was trying to derive the bohr equation

Vt.PECO2=(Vt-Vd)PACO2 is pretty easy to remember if you need to know this kind of crap, and Vd/Vt is the shunt fraction. I just substitued abcd cos writing all the original terms down a million times was pissing me off.

Bet you wish you'd never asked

proto

12/04/2007 at 16:57

Christian Bohr, father of Niels Bohr. Thought you'd like to know

www.dotbike.com - seriously cheap cycling stuff !!

trooper

12/04/2007 at 17:09

trogggy wrote

ab= (a-c)d

ab=ad-cd

cd=ad-ab

cd=a(d-b)

c=a(d-b)/d

c/a=(d-b)/d

Whassitfor?

He's right y'know.

Gold star for you Troggy, and you can go home early.

I am ...Fernando Martinez.

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