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#26 2013-07-13 04:16:59

TryingMyBest50
Member
Registered: 2013-07-12
Posts: 13

Re: Linear equations

So i would solve the linear inequality problem the same way i solve the linear equation, but replace the equal sign with < or >

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#27 2013-07-13 04:24:49

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,582

Re: Linear equations

Hi;

There is no reason to replace the equality with either of those that I understand. It is totally arbitrary.

Is there more to the question? Have you left anything out?


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

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#28 2013-07-13 04:44:27

TryingMyBest50
Member
Registered: 2013-07-12
Posts: 13

Re: Linear equations

No, i just need to change my 1-variable linear equation to a linear inequality using < or >.

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#29 2013-07-13 04:54:23

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,582

Re: Linear equations

Post #25 does that for all 4 possibilities.


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#30 2013-07-15 02:07:46

TryingMyBest50
Member
Registered: 2013-07-12
Posts: 13

Re: Linear equations

Good morning bobbym. Would i solve it like this

4x + 11 < 6x - 3

4x - 6x + 11 < - 6x - 6x - 3

2x + 11 -11 < -3 - 11

2x < - 8

-2x/-2 < -8/-2 = x < 4

and check it

4(4) + 11 < 6(4) - 3

16 + 11 < 24 - 3

27 < 27

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#31 2013-07-15 02:17:30

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,582

Re: Linear equations

Hi;

I am not getting that. Please recheck your work.


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#32 2013-07-15 02:29:39

TryingMyBest50
Member
Registered: 2013-07-12
Posts: 13

Re: Linear equations

Ok, if you had to change 4x+11=6x-3 into a linear inequality how would you do it, and how would you solve it?

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#33 2013-07-15 02:32:29

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,582

Re: Linear equations

Hi;

In line 2) 4x - 6x = -2x

In your line 3) -3 - 11 = -14

Here is how to do it.

4x + 11 < 6x - 3

Take 4x away from both sides.

11 < 2x - 3

Add 3 to both sides.

14 < 2x

Divide both sides by 2.

7 < x

Or

x > 7


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#34 2013-07-15 02:54:29

TryingMyBest50
Member
Registered: 2013-07-12
Posts: 13

Re: Linear equations

Ok, i see that i should've have added the 3 - 11. Thank you so much!:) Have a great morning!

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#35 2013-07-15 03:00:25

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,582

Re: Linear equations

You are welcome, post if you need more.


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

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