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#1 2012-07-19 04:29:57
- SlowlyFading
- Member
- Registered: 2012-06-12
- Posts: 149
Help me Find Two Points in the Problem x + y = 3?
I can't get the right answer for this one, simple because I'm not sure how. So if someone could give me the answer and show/explain how they got it that would be perfect. That way I can learn to do ones like this myself.
The problem is:
x + y = 3
I'm just here to get some help with an online math course I'm taking.
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#2 2012-07-19 05:46:47
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Help me Find Two Points in the Problem x + y = 3?
Hi SlowlyFading;
First that is not the same as x + 5 = 3. Your equation has 2 variables to be solved for. That means an infinite number of solutions.
Do you know how to graph that?
To find two points as your heading asks just do this.
1) Pick any variable.
Let's pick x.
2) Pick a value for that variable.
Pick x = 2.
3) Subtitute into your equation.
x + y = 3
2 + y = 3
Can you solve that? If you can you have your first point. If not let me know.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#3 2012-07-19 16:44:28
- SlowlyFading
- Member
- Registered: 2012-06-12
- Posts: 149
Re: Help me Find Two Points in the Problem x + y = 3?
Yes, I know how to graph such problems, once I have the points. 
I'm sorry, I don't know how to solve 2 + y = 3
I could solve it easily if it were, say like this; 2x + 3y = 6
But it isn't so I'm lost. 
I'm just here to get some help with an online math course I'm taking.
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#4 2012-07-19 17:42:09
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Help me Find Two Points in the Problem x + y = 3?
Hi SlowlyFading;
I'm sorry, I don't know how to solve 2 + y = 3
Do not worry, no one knows how until they are shown.
2 + y = 3 is easy to solve once you know how. You want to get the variable which is y by itself on one side of the equation.
2 + y = 3
If we subtract 2 from both sides of the equation we will get y by itself.
2 - 2 + y = 3 - 2
2 - 2 = 0 so the left hand side becomes
0 + y = 3 - 2
Now y + 0 is the same as y so the left hand side becomes
y = 3 - 2
Now 3 - 2 = 1 so the right side becomes
y = 1
We are done! We have solved for y. How about another one?
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#5 2012-07-20 04:09:18
- SlowlyFading
- Member
- Registered: 2012-06-12
- Posts: 149
Re: Help me Find Two Points in the Problem x + y = 3?
Thank you so much for helping me with that.
Well, that was the only problem like that on my work.
I'm just here to get some help with an online math course I'm taking.
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#6 2012-07-20 04:20:54
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Help me Find Two Points in the Problem x + y = 3?
Hi SlowlyFading;
You are welcome!
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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