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#1 2007-12-09 09:09:31

HannahBanana
Guest

Horrible Equations!!!!!

I need the answers to these problems PRONTO.THANX

1.  -2 5/12(5/12+n)=-6235/1008


2.  9/5(v+5 7/12)=39/4


3.  -10-11x=739/24


4.  l 5-4p l=-7


5.  l 1-8r l=1


6.  l -3.1+n l=9.1


7.  1/7(-4/3n+4/3) + 13/4n=n+2061/224


8.   1/2(-2n+1/2)=27/20-3/5n


9.   3/8(n-1/2)=27/20-3/5n


10.   3/8(n-1/2)=3/5n-543/400


11.   3.2x-37.9265=1.814-7.9(1-7.36x)


12.   4.4-4.6(x+6)=-28.7-3.6x


13.   -6.1p-3.8(p+1.3)=-6.9p-27.74

#2 2007-12-09 18:31:07

ganesh
Moderator
Registered: 2005-06-28
Posts: 22,981

Re: Horrible Equations!!!!!

Is this your homework by any chance? These equations are all having one variable only and are pretty easy to solve. Please try them yourself and if you find it difficult to solve, post them here!


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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#3 2007-12-09 21:58:04

NullRoot
Member
Registered: 2007-11-19
Posts: 162

Re: Horrible Equations!!!!!

I notice there's a lot of fractions in these, so that might be where you find difficulty. Here's some rules to help:

1.

2.

3.


I've also noticed you've got stuff like this in those equations: |3-r|
The bar notation means that if the answer is negative, then remove the negative sign. It wants what we call the "absolute value". What worries me is that this is one of your questions is...
4.  l 5-4p l=-7
...which doesn't really make sense.

Normally these questions have two answers. One which will give you a positive answer and one that gives you a negative answer (which is then changed to a positive answer because of the bars).
To solve these, take this example:
| 10 - x | = 7
To solve for x, you need to first solve for when the answer was positive without the effect of the bars. You can take the bars out of the equation first. So:
10 - x = 7
- x = -3
x = 3

Next you need to solve for the fact that the 7 could be positive because of the bars. So drop the bars and make the 7 a negative number:
10 - x = -7
-x = -17
x = 17

So the answers to |10 - x| = 7 is 3 or 17.


Trillian: Five to one against and falling. Four to one against and falling… Three to one, two, one. Probability factor of one to one. We have normality. I repeat, we have normality. Anything you still can’t cope with is therefore your own problem.

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#4 2017-03-09 15:42:26

Monox D. I-Fly
Member
Registered: 2015-12-02
Posts: 730

Re: Horrible Equations!!!!!

HannahBanana wrote:

11.   3.2x-37.9265=1.814-7.9(1-7.36x)


12.   4.4-4.6(x+6)=-28.7-3.6x


13.   -6.1p-3.8(p+1.3)=-6.9p-27.74

For those numbers you solve it normally as if the decimal fractions were integers.

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#5 2017-03-09 23:37:05

iamaditya
Member
From: Planet Mars
Registered: 2016-11-15
Posts: 553

Re: Horrible Equations!!!!!

Hi HannahBanana,
I do not know whether you know how to solve linear equations or not;yes it seems like your school homework and if you don't know then I would recommend you to first read Solving Equationsin Maths is fun(and you may practice the exercises in there as well) and then try to solve the questions yourself.


Practice makes a man perfect.
There is no substitute to hard work
All of us do not have equal talents but everybody has equal oppurtunities to build their talents.-APJ Abdul Kalam

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#6 2017-03-10 03:28:49

CIV
Member
Registered: 2014-11-09
Posts: 66

Re: Horrible Equations!!!!!

If you want the answers, you have to show us your best effort at trying to solve them first.

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#7 2017-03-10 10:17:41

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,496

Re: Horrible Equations!!!!!

I think he missed his deadline.


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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#8 2017-03-12 02:44:57

CIV
Member
Registered: 2014-11-09
Posts: 66

Re: Horrible Equations!!!!!

bobbym wrote:

I think he missed his deadline.

Probably.

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#9 2017-03-12 07:57:13

bob bundy
Moderator
Registered: 2010-06-20
Posts: 7,938

Re: Horrible Equations!!!!!

Why are we even bothering with homework that is 10 years out of date?

Besides which, I'm not sure I like the PRONTO. THANX  .... (1) Pronto seems a bit demanding; (2) Thanks isn't even spelt correctly smile .

Bob


Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

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#10 2017-03-12 16:49:42

CIV
Member
Registered: 2014-11-09
Posts: 66

Re: Horrible Equations!!!!!

bob bundy wrote:

Why are we even bothering with homework that is 10 years out of date?

Besides which, I'm not sure I like the PRONTO. THANX  .... (1) Pronto seems a bit demanding; (2) Thanks isn't even spelt correctly smile .

Bob

Exactly. HA HA HA.

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#11 2017-03-12 18:17:58

Monox D. I-Fly
Member
Registered: 2015-12-02
Posts: 730

Re: Horrible Equations!!!!!

bob bundy wrote:

Why are we even bothering with homework that is 10 years out of date?

Besides which, I'm not sure I like the PRONTO. THANX  .... (1) Pronto seems a bit demanding; (2) Thanks isn't even spelt correctly smile .

Bob

(1) I just wanted to practice
(2) 10 year reply is my punishment for lazy people like that

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#12 2017-03-12 20:45:35

bob bundy
Moderator
Registered: 2010-06-20
Posts: 7,938

Re: Horrible Equations!!!!!

hi Monox D. I-Fly

I just wanted to practice

OK that's fine.  I have a favour to ask.  If you pick up an old thread and make a comment, I spend time looking at the problem before realising there's no point as it's too late to offer the original poster any help.  But if you try the questions and need help yourself, then I'm very willing to help if I can.  So please would you make it clear which of these alternatives applies so I know what to do.  Thanks a lot,

Bob


Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

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#13 2017-03-13 15:01:06

Monox D. I-Fly
Member
Registered: 2015-12-02
Posts: 730

Re: Horrible Equations!!!!!

bob bundy wrote:

hi Monox D. I-Fly

I just wanted to practice

OK that's fine.  I have a favour to ask.  If you pick up an old thread and make a comment, I spend time looking at the problem before realising there's no point as it's too late to offer the original poster any help.  But if you try the questions and need help yourself, then I'm very willing to help if I can.  So please would you make it clear which of these alternatives applies so I know what to do.  Thanks a lot,

Bob

It's the first one, so I think you can ignore me in this regard.

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