Math Is Fun Forum

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

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,395

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!

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It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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

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.

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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.

Monox D. I-Fly

Member

From: Indonesia

Registered: 2015-12-02

Posts: 2,000

Re: Horrible Equations!!!!!

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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Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away.
May his adventurous soul rest in peace at heaven.

iamaditya

Member

From: Planet Mars

Registered: 2016-11-15

Posts: 821

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.

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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

CIV

Member

Registered: 2014-11-09

Posts: 74

Re: Horrible Equations!!!!!

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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Horrible Equations!!!!!

I think he missed his deadline.

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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.

CIV

Member

Registered: 2014-11-09

Posts: 74

Re: Horrible Equations!!!!!

I think he missed his deadline.

Probably.

Bob

Administrator

Registered: 2010-06-20

Posts: 10,621

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 .

Bob

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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
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

CIV

Member

Registered: 2014-11-09

Posts: 74

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 .

Bob

Exactly. HA HA HA.

Monox D. I-Fly

Member

From: Indonesia

Registered: 2015-12-02

Posts: 2,000

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 .

Bob

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

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Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away.
May his adventurous soul rest in peace at heaven.

Bob

Administrator

Registered: 2010-06-20

Posts: 10,621

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

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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
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

Monox D. I-Fly

Member

From: Indonesia

Registered: 2015-12-02

Posts: 2,000

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

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

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Actually I never watch Star Wars and not interested in it anyway, but I choose a Yoda card as my avatar in honor of our great friend bobbym who has passed away.
May his adventurous soul rest in peace at heaven.