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## #1 2013-05-16 01:33:19

mom
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### 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

## #2 2013-05-16 01:38:28

bobbym
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### 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.

## #3 2013-05-16 02:32:19

mom
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### Re: equation describing the same line

Ok, can you explain why so I understand?

## #4 2013-05-16 02:38:01

bobbym
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### 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.

## #5 2013-05-16 03:04:29

mom
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### Re: equation describing the same line

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

## #6 2013-05-16 03:07:47

bobbym
Administrator

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### 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.

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