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#26 2013-03-10 06:29:26

Al-Allo
Member
Registered: 2012-08-23
Posts: 293

Re: Algebra -Subject

Okay, Im here. And Bobbym, really haven't you ANY suggestions on how to begin these equations ? I'm feeling that there is no methodology in what Im doing...

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#27 2013-03-10 06:33:36

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 82,935

Re: Algebra -Subject

It does take experience to do some of these. You gain that experience by doing them. The beginning stuff is right here:

http://www.mathsisfun.com/algebra/equat … lving.html


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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#28 2013-03-10 06:43:37

Al-Allo
Member
Registered: 2012-08-23
Posts: 293

Re: Algebra -Subject

Yes, I guess I'll still keep practicing. thanks

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#29 2013-03-10 06:46:55

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 82,935

Re: Algebra -Subject

How about this one here:

Can you get c as the subject?


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Online

#30 2013-03-10 06:48:41

Al-Allo
Member
Registered: 2012-08-23
Posts: 293

Re: Algebra -Subject

c=b+2/a

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#31 2013-03-10 06:55:53

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 82,935

Re: Algebra -Subject

That is correct!

Make b the subject.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Online

#32 2013-03-10 07:01:30

Al-Allo
Member
Registered: 2012-08-23
Posts: 293

Re: Algebra -Subject

Just a question, If I distribute the b on the right, I must also distribute it for 2 ? (Must I distribute to all the right side of the equation ?

1/a=2b ?

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#33 2013-03-10 07:06:35

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 82,935

Re: Algebra -Subject

Hi;

I am not following you. What are you trying to do?


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Online

#34 2013-03-10 07:14:43

Al-Allo
Member
Registered: 2012-08-23
Posts: 293

Re: Algebra -Subject

Im trying to isolate b on the right of the equation, but must I also distribute the B to the whole right side of the equation ?

*b 1/a=1/b+2 *b (to the 1/b AND to the 2)

which gives :
b/a=2b

?

Last edited by Al-Allo (2013-03-10 07:15:06)

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#35 2013-03-10 07:19:59

Al-Allo
Member
Registered: 2012-08-23
Posts: 293

Re: Algebra -Subject

Foget my question, heres my answer b=2a

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#36 2013-03-10 07:22:54

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 82,935

Re: Algebra -Subject

Hi;

That is not correct. Please show me your first step.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Online

#37 2013-03-10 07:24:03

Al-Allo
Member
Registered: 2012-08-23
Posts: 293

Re: Algebra -Subject

*b   1/a= 1b +2 *b

b/a=+2

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#38 2013-03-10 07:25:27

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 82,935

Re: Algebra -Subject

The left side is correct.

When you multiply the right side by b, that means everything on the right gets multiplied by b. Try it again.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Online

#39 2013-03-10 07:28:19

Al-Allo
Member
Registered: 2012-08-23
Posts: 293

Re: Algebra -Subject

Sorry Bobbym, Ive got other to finish. Il try it on my own, Im feelng that Im lacking knowledge in algebra, maybe I should do a review ^^

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#40 2013-03-10 07:34:00

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 82,935

Re: Algebra -Subject

You only need some practice on that type.


In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

Online

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