Question

9(4x-4)=3(12x+7)
when I worked t out i got just 57 no x
my choices are
all real numbers
or set is empty
which is it ?

Answer 1

okay i can help you here if you on here?

Answer 2

i am here

Answer 3

how do I write this

Answer 4

show me what you did with this 9(4x-4)=3(12x+7)

Answer 5

OK, here we go

Answer 6

work with just the nine ony

Answer 7

do this only 9(4x-4) I want to see your steps.

Answer 8

9(4x-4)=3(12x+7)
36x-4=36x+7
36x-4+4=36x+7+4
36x-36x=11
ok here is where I get lost because there is no x so is the answer real or empty

Answer 9

my bad i messed up

Answer 10

9(4x-4) is
36x-36

Answer 11

yes so what is x now?

Answer 12

36 ?

Answer 13

no .. try again hint we want X alone.

Answer 14

there is no x because 36x-36x is nothing

Answer 15

lost

Answer 16

9*4=36 and

3*12 is 36

Answer 17

okay first off there are not two 36x-36x wrong. 9(4x-4) doesn't = 36x-36x no

Answer 18

36x-36 ?

Answer 19

yes

Answer 20

LOL I feel so stupid

Answer 21

don't feel that way, sometimes i make little mistakes as well. we all learn in different ways.

Answer 22

yes I know I am a visual learner

Answer 23

yes that is okay.

Answer 24

now for the other side i got 36x+21

Answer 25

hey one thing is slow down and do the steps, don't skip ahead just some friendly advice

Answer 26

tootie you are correct with your solution the expansion is

36x - 36 = 36x + 21

subtract 36x from both sides and you get

-36 = 21

no solution

Answer 27

yes that is 36x+21 now again how do we get x alone?

Answer 28

subtract 36x-36x

Answer 29

its basically saying y = 36x - 36
and y = 36x + 21

the lines are parallel ... so no intersection....

Answer 30

campbell yes are right about 36x-36x I wasn't at that point yet..

Answer 31

well tootie has actually has a correct piece of maths above... sorry...

Answer 32

so the solution set is empty. right?

Answer 33

I was walking through the steps campbell

Answer 34

correct... just practise expanding terms in brackets...

Answer 35

the expansion of the pronumeral was correct... its just the constant term you need to be aware of

Answer 36

thank you for taking me through the steps I was not sure if I worked it right Godorovg

Answer 37

tootie 149 I was going through the steps with you, and to make sure you understood what was going

Answer 38

empty is the answer

Answer 39

Thank you so much I needed to know I worked it right, and you did that thank you again

Answer 40

hope it helps...

Answer 41

oh no trouble at all..

Answer 42

in this case if there is no x, then the set is empty, if it's all real number, all real number would work with the equation.

Answer 43

right back at you I am a fan of yours now too. :)

Answer 44

tiffanymak could you give me an example of what you mean when it comes to real numbers

Answer 45

real numbers are 1,2,3 ,5 and so on

Answer 46

still lost when it comes to real numbers.

Answer 47

real numbers are like all kinds of number, rational, irrational, integer etc. just not complex number.

Answer 48

say: integer: - [infinite], -8, -7, -6,-5...0,1,2,3,4,5....., [infinite]
these are real no.s

Answer 49

hey tootie look at this http://math10.edcentre.ca/bridgemath/numbers/setnos.php

Answer 50

sqrt 2, sqrt3, pi etc, are real numbers

Answer 51

yeah, and well that link too.

Answer 52

almost every kind of no.s are real, except for i, (which is sqrt(-1)) the imaginary number

Answer 53

Tootie what is the biggest problem in the class you are in??

Answer 54

there is so much I do not know where to start

Answer 55

okay I am guessing this college algbra right?

Answer 56

YOU got it

Answer 57

okay first off in this class I can find you videos where can get the basics by watching would that help you?

Answer 58

but the said part my daughter was doing this in the 6th grade here, and they make little remarks about it

Answer 59

yes that would be great!!!!!!!

Answer 60

Tootie here is a shock I taught myself math through videos on the internet.

Answer 61

really please give me the links.

Answer 62

a really good site would be the paul's notes

Answer 63

okay will back

Answer 64

paul's notes

Answer 65

I will be waiting Godorovg

Answer 66

tootie... have a look at Khan academy on youtube..or google Khan Academy... they have lots of videos explaining concepts

Answer 67

never heard of them

Answer 68

MIT has free online courses for tons of subject, i don't know about algebra but you can check out their site.

Answer 69

just looked it up thanks so much campbell_st

Answer 70

the MIT?

Answer 71

yeah

Answer 72

ok will look it up thanks so much, so much

Answer 73

tootie watch this video

http://www.youtube.com/watch?v=1Amt_-uB9QQ

Answer 74

http://ocw.mit.edu/courses/

Answer 75

that's the link

Answer 76

looking now will come back after i look at it

Answer 77

tootie it is the first part of this class

Answer 78

thanks to everyone for their help. really thanks

Answer 79

Ok

Answer 80

Always glad to help out :)

Answer 81

so, do you home study math?

Answer 82

yes and I am working on Physics and chem through MIT open course study right now. Plus Calc 1 and Cal2 as well

Answer 83

cool, i study through stanford.

Answer 84

I wish I could get in there.

Answer 85

can't now because I ran away to college when I wasn't ready GPA way too low.

Answer 86

me too, i'm only joining their for gifted child program, but still has two years to go till college.

Answer 87

yeah, funny thing is I didn't how I was gifted math either.

Answer 88

what's the difference between college and university?

Answer 89

Tiffany when I first took I couldn't get it and than day by day it started to make sense until now here I am.

Answer 90

nothing really expect for name . Now there two year and four colleges and University out there. It all depends on what you want to do in college?

Answer 91

also, depending on your major you could go on-line and get your degree.

Answer 92

i can't decide yet, math and literature is my life, but my parents wants me to be a lawyer, just to make sure i'll have enough to live by

Answer 93

Lawyers would be okay, only thing is you go to school for eight to nine years than have to past a test to become a lawyer.

Answer 94

i'll be so old by then :)

Answer 95

nah you are still pretty young I am guessing

Answer 96

nah, just old for starting to work

Answer 97

yeah it happens no big deal. I think most jobs want older people now a days

Answer 98

hey tootie what you think about the video?