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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: 86,636

Re: equation describing the same line

Hi;

Choose the second one.


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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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: 86,636

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.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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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: 86,636

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.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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