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#1 2013-05-15 03:33:19

mom
Member
Registered: 2012-04-25
Posts: 94

equation describing the same line

Can anyone help me with this problem?

Which of the following equations describe the same line as the equation 3x+4y=5?

y=3/4x+5
5-3x-4y=0
y=3/4x+5/4
6x+8y=5

Thanks

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#2 2013-05-15 03:38:28

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,501

Re: equation describing the same line

Hi;

Choose the second one.


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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#3 2013-05-15 04:32:19

mom
Member
Registered: 2012-04-25
Posts: 94

Re: equation describing the same line

Ok, can you explain why so I understand?

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#4 2013-05-15 04:38:01

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,501

Re: equation describing the same line

Subtract 3x from both sides.

Subtract 4y from both sides.

Put the 0 on the other side.

Which matches the second one.


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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#5 2013-05-15 05:04:29

mom
Member
Registered: 2012-04-25
Posts: 94

Re: equation describing the same line

I worked it out again and got it. Thanks so much

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#6 2013-05-15 05:07:47

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,501

Re: equation describing the same line

Good that you worked it out yourself.


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.

Offline

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