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#1 2012-07-25 12:17:49
- SlowlyFading
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- Registered: 2012-06-12
- Posts: 149
Could you help me find points from x + y = 0 and 3x + y = -4
I need two points from each problem! If you could show your work that would be great.
x + y = 0 and 3x + y = -4
I'm just here to get some help with an online math course I'm taking.
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#2 2012-07-25 20:35:55
- debjit625
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- Registered: 2012-07-23
- Posts: 101
Re: Could you help me find points from x + y = 0 and 3x + y = -4
For the first equation the line crosses through the origin so you have to guess x and y anything other than 0
Let x = 1
Substitute x by 1
Subtract 1 from both the sides
Now for the other point let x = 2
Substitute x by 2
Subtract 2 from both the sides
So the two points for the equation is and
For the second equation you can use intercept...
First point for the equation
Let x be 0
Substitute x by 0
Now for the other point
Let y = 0
Substitute y by 0
So the two points for the equation is and
Good Luck
Last edited by debjit625 (2012-07-25 20:45:23)
Debjit Roy
___________________________________________________
The essence of mathematics lies in its freedom - Georg Cantor
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#3 2012-07-25 20:57:57
- anonimnystefy
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- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
Re: Could you help me find points from x + y = 0 and 3x + y = -4
Hi debjit625
Do you suggest graphing the two lines to find the solution?
Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.
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#4 2012-07-25 21:26:44
- debjit625
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- Registered: 2012-07-23
- Posts: 101
Re: Could you help me find points from x + y = 0 and 3x + y = -4
No ,I did it algebraically ,you dont have to graph those four points.
And what solution your are asking about,I think SlowlyFading asked about two points (coordinates) from the two equations and I show him how.
He asked
I need two points from each problem!
If he asked something else then I don't know...
Good Luck
Debjit Roy
___________________________________________________
The essence of mathematics lies in its freedom - Georg Cantor
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#5 2012-07-25 21:30:28
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
Re: Could you help me find points from x + y = 0 and 3x + y = -4
Hi debjt625
Oh, ok. I should read posts more carefully.
Nice avatar, btw.
Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.
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#6 2012-07-27 04:42:50
- SlowlyFading
- Member
- Registered: 2012-06-12
- Posts: 149
Re: Could you help me find points from x + y = 0 and 3x + y = -4
Thank you! 
I'm just here to get some help with an online math course I'm taking.
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