Alright. Who can solve this and tell me....

2006-09-24 04:30:41

#1

SteikeTa: Member; +153|7064|Norway/Norwegen/ Norge/Noruega

I just started a night course on the high school i went to some years ago. Took only first degree math. I'm taking second degree right now. Right now we are refreshing some of the first degree math. Damn there are so many things i don't remember. I am doing...... decent. Maybe not.
But this one i could not solve. So, can anyone solve this and tell/show me why the answer is what it is?

https://img1.putfile.com/thumb/9/26607465855.jpg

At first i thought that X was 1. When i put it to the test( left side compared to right side), and it was not correct.
Looked through what i had done and thought I had made one mistake and that X was 3/5...
Anyone can explain this one to me and show me how it is solved?

Thanks

Last edited by SteikeTa (2006-09-24 04:47:29)

2006-09-24 04:32:39

#2

luckeydogg: Member; +35|6845|C:/system32/pimp.exe

False... No wait... The answer is C: pickle

2006-09-24 04:33:18

#3

Swiss: Member; +20|6861

i got x = 5

2006-09-24 04:33:55

#4

Cybargs: Moderated; +2,285|7032

You fail at algebra...

answer is

5X-3 over 10

https://cache.www.gametracker.com/server_info/203.46.105.23:21300/b_350_20_692108_381007_FFFFFF_000000.png

2006-09-24 04:35:07

#5

Swiss: Member; +20|6861

this equation does have "= 0" right? It's not a minus sign is it?

2006-09-24 04:35:55

#6

naightknifar: Served and Out; +642|6877|Southampton, UK

6
_
50

Explanation - Calculator.

2006-09-24 04:36:04

#7

SteikeTa: Member; +153|7064|Norway/Norwegen/ Norge/Noruega

Swiss wrote:
this equation does have "= 0" right? It's not a minus sign is it?

Yes, its =0

2006-09-24 04:37:13

#8

Cybargs: Moderated; +2,285|7032

SteikeTa wrote:
Swiss wrote:
this equation does have "= 0" right? It's not a minus sign is it?
Yes, its =0

fuck... thought it was a minus sign.

2006-09-24 04:37:56

#9

SteikeTa: Member; +153|7064|Norway/Norwegen/ Norge/Noruega

cyborg_ninja-117 wrote:
SteikeTa wrote:
Swiss wrote:
this equation does have "= 0" right? It's not a minus sign is it?
Yes, its =0
fuck... thought it was a minus sign.

hehe, good. cause i was like this: wtf??

Last edited by SteikeTa (2006-09-24 04:38:15)

2006-09-24 04:38:18

#10

Swiss: Member; +20|6861

Basically, if i remember, you cross multiply to get 10(4X-2) + 5(3X-1) = 0
20X - 20 + 15X - 5 = 0
5X - 25 = 0
5X = 25
X = 5

Last edited by Swiss (2006-09-24 04:38:45)

2006-09-24 04:39:05

#11

Phatso: The Moisture; +49|7011|South Africa

x=1

er.. i mean x=5... damn algebra was a loooong time ago...

Last edited by Phatso (2006-09-24 04:40:24)

2006-09-24 04:40:36

#12

SteikeTa: Member; +153|7064|Norway/Norwegen/ Norge/Noruega

Swiss wrote:
Basically, if i remember, you cross multiply to get 10(4X-2) + 5(3X-1) = 0
20X - 20 + 15X - 5 = 0
5X - 25 = 0
5X = 25
X = 5

But if you put it to the test, its wrong. Left side is not the same as right side. If you know what i mean
What i mean is that x has to be something that makes the left side to be zero. So it is the same as the right side.. witch is zero
On all the questions, after i have found x... i have to put it to the test afterwords

Last edited by SteikeTa (2006-09-24 04:43:07)

2006-09-24 04:41:30

#13

Reciprocity: Member; +721|6896|the dank(super) side of Oregon

my brain is stinging

2006-09-24 04:43:50

#14

jimmanycricket: EBC Member; +56|6971|Cambridge, England

((4x-2)/5)-((3x-1)/10) =0

<=> ((4x-2)/5) = ((3x-1)/10)

<=> 8x-4=3x-1

<=>5x=3

<=>x=3/5

TEST

((4(3/5)-2)/5)-((3(3/5)-1)/10) =0

<=> ((12/5 - 2)/5)-(9/5-1)/10) =0

<=> ((2/5)/5)-(4/5)/10) =0

<=> 0.08- 0.08 = 0

Edit. added TEST

Last edited by jimmanycricket (2006-09-24 04:51:24)

2006-09-24 04:46:28

#15

Reciprocity: Member; +721|6896|the dank(super) side of Oregon

jimmanycricket wrote:
((4x-2)/5)-((3x-1)/10) =0

=> ((4x-2)/5)=((3x-1)/10)

=> 8x-4=3x-1

=>5x=3

=>x=3/5

I also came up with that. but it's 5am and the batteries in my graphing calculator have been dead for 4 years.

([4x-2]/5)=([-3x+1]/10)
10(4x-2)=5(-3x+1)
40x-20=-15x=5
25x-15=0
(25x)/5=15/5
5x=3
x=3/5

Last edited by Reciprocity (2006-09-24 04:53:17)

2006-09-24 04:50:36

#16

ToiletTrooper: Member; +25|7091|WC

My answer = WTF!

Last edited by ToiletTrooper (2006-09-24 04:50:54)

2006-09-24 04:51:00

#17

SteikeTa: Member; +153|7064|Norway/Norwegen/ Norge/Noruega

jimmanycricket wrote:
((4x-2)/5)-((3x-1)/10) =0

=> ((4x-2)/5) = ((3x-1)/10)

=> 8x-4=3x-1

=>5x=3

=>x=3/5

TEST

((4(3/5)-2)/5)-((3(3/5)-1)/10) =0

((12/5 - 2)/5)-(9/5-1)/10) =0

((2/5)/5)-(4/5)/10) =0

0.08- 0.08 = 0

Edit. added TEST

Damn. I really dont understand what you did on the test when its written like that
Ow man this course is going to be hard...

2006-09-24 04:51:58

#18

Cybargs: Moderated; +2,285|7032

Just plug the X back in and see if you got the answer

2006-09-24 04:52:11

#19

jimmanycricket: EBC Member; +56|6971|Cambridge, England

all i did was put x=3/5 into the equation and saw if i came to a logical truth

do i get karma for this or have i just wasted 5 minuets of my precious time?

Last edited by jimmanycricket (2006-09-24 04:54:11)

2006-09-24 04:55:07

#20

Reciprocity: Member; +721|6896|the dank(super) side of Oregon

distributive property
multiplication property
transitive property

a bunch of fucking properties

2006-09-24 04:56:39

#21

SteikeTa: Member; +153|7064|Norway/Norwegen/ Norge/Noruega

jimmanycricket wrote:
all i did was put x=3/5 into the equation and saw if i came to a logical truth

Yes i know
X is 3 over 5. 3/5. Meaning that i have to multiplie 3/5 to 4, minus 2 and divide it with 5: the answer to that, minus: 3 multipli with 3/5... minus 1 divided with 10. Dont remember how to do this... so many fractures(dont know if fractures are the right words for it in english) probably not.

2006-09-24 04:57:39

#22

jimmanycricket: EBC Member; +56|6971|Cambridge, England

fractions...
clue. 2 = 10/5 's

you multiply fractions by multiplying the the top of the fraction eg. 5/5 times 5 = 25/5 =5 as expected as 5/5 =1

Last edited by jimmanycricket (2006-09-24 04:59:50)

2006-09-24 05:01:56

#23

Vub: The Power of Two; +188|6810|Sydney, Australia

Basic steps of algebra:

1. Put over common denominator, in this case, it is 10.

(8x - 4 - 3x + 1)/10 = 0

2. Simplify your numerator.

(5x - 3)/10 = 0

3. Now cross multiply, in this case you times 10 to both sides. 0 x any integer = 0

(5x - 3) = 0

4. Put unknowns on one side, put integers on the other side of the equation.

5x=3

5. Solve

Therefore x = 3/5

2006-09-24 05:03:16

#24

Reciprocity: Member; +721|6896|the dank(super) side of Oregon

SteikeTa wrote:
jimmanycricket wrote:
all i did was put x=3/5 into the equation and saw if i came to a logical truth
Yes i know
X is 3 over 5. 3/5. Meaning that i have to multiplie 3/5 to 4, minus 2 and divide it with 5: the answer to that, minus: 3 multipli with 3/5... minus 1 divided with 10. Dont remember how to do this... so many fractures(dont know if fractures are the right words for it in english) probably not.

algebra is all about learing how to manipulate equations with math rules called "properties". keep in mind, action => reaction. you can do nearly anyting to an equation as long as you do it to both sides.

If x+2=0 then by subtracting 2 from both sides of the equation you get x=-2

Last edited by Reciprocity (2006-09-24 05:04:29)

2006-09-24 05:05:15

#25

Vub: The Power of Two; +188|6810|Sydney, Australia

Please note the above method is not the only method of solving this equation, so if you don't start like how I started, don't worry. Other steps you can take:

change equation to (4x - 2)/5 = (3x - 1)/10
then you cross multiply, collect like terms and so on so forth.

And if all else fails, trial and error is your best friend.

BF2S Forums Alright. Who can solve this and tell me....

Swiss wrote:

SteikeTa wrote:

Swiss wrote:

cyborg_ninja-117 wrote:

SteikeTa wrote:

Swiss wrote:

Swiss wrote:

jimmanycricket wrote:

jimmanycricket wrote:

jimmanycricket wrote:

SteikeTa wrote:

jimmanycricket wrote:

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