## tootie149 3 years ago 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 ?

1. godorovg

2. tootie149

i am here

3. tootie149

how do I write this

4. godorovg

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

5. tootie149

OK, here we go

6. godorovg

work with just the nine ony

7. godorovg

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

8. tootie149

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

9. tootie149

10. tootie149

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

11. godorovg

yes so what is x now?

12. tootie149

36 ?

13. godorovg

no .. try again hint we want X alone.

14. tootie149

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

15. tootie149

lost

16. tootie149

9*4=36 and 3*12 is 36

17. godorovg

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

18. tootie149

36x-36 ?

19. godorovg

yes

20. tootie149

LOL I feel so stupid

21. godorovg

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

22. tootie149

yes I know I am a visual learner

23. godorovg

yes that is okay.

24. tootie149

now for the other side i got 36x+21

25. godorovg

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

26. campbell_st

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

27. godorovg

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

28. tootie149

subtract 36x-36x

29. campbell_st

its basically saying y = 36x - 36 and y = 36x + 21 the lines are parallel ... so no intersection....

30. godorovg

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

31. campbell_st

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

32. tootie149

so the solution set is empty. right?

33. godorovg

I was walking through the steps campbell

34. campbell_st

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

35. campbell_st

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

36. tootie149

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

37. godorovg

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

38. k.rajabhishek

39. tootie149

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

40. campbell_st

hope it helps...

41. godorovg

oh no trouble at all..

42. tiffanymak1996

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.

43. godorovg

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

44. tootie149

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

45. godorovg

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

46. tootie149

still lost when it comes to real numbers.

47. tiffanymak1996

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

48. tiffanymak1996

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

49. godorovg

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

50. tiffanymak1996

sqrt 2, sqrt3, pi etc, are real numbers

51. tiffanymak1996

yeah, and well that link too.

52. tiffanymak1996

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

53. godorovg

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

54. tootie149

there is so much I do not know where to start

55. godorovg

okay I am guessing this college algbra right?

56. tootie149

YOU got it

57. godorovg

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

58. tootie149

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

59. tootie149

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

60. godorovg

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

61. tootie149

62. tiffanymak1996

a really good site would be the paul's notes

63. godorovg

okay will back

64. tootie149

paul's notes

65. tootie149

I will be waiting Godorovg

66. campbell_st

67. tootie149

never heard of them

68. tiffanymak1996

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

69. tootie149

just looked it up thanks so much campbell_st

70. tootie149

the MIT?

71. tiffanymak1996

yeah

72. tootie149

ok will look it up thanks so much, so much

73. godorovg

74. tiffanymak1996
75. tiffanymak1996

76. tootie149

looking now will come back after i look at it

77. godorovg

tootie it is the first part of this class

78. tootie149

thanks to everyone for their help. really thanks

79. tootie149

Ok

80. godorovg

Always glad to help out :)

81. tiffanymak1996

so, do you home study math?

82. godorovg

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

83. tiffanymak1996

cool, i study through stanford.

84. godorovg

I wish I could get in there.

85. godorovg

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

86. tiffanymak1996

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

87. godorovg

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

88. tiffanymak1996

what's the difference between college and university?

89. godorovg

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.

90. godorovg

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?

91. godorovg

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

92. tiffanymak1996

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

93. godorovg

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.

94. tiffanymak1996

i'll be so old by then :)

95. godorovg

nah you are still pretty young I am guessing

96. tiffanymak1996

nah, just old for starting to work

97. godorovg

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

98. godorovg

hey tootie what you think about the video?

99. tootie149

Loved it godorvg and all of the other sites as well

100. godorovg

Tootie I know in you can do this math, relax and take your time with things. Also, don;t be afraid to ask for help if you need it. There is nothing wrong in asking a questions

101. godorovg

Tootie when watching these videos please take notes, it only helps you to learn the what is being taught.

102. tootie149

Thank you I had no one until I found this site. I thank God for it and all of you

103. godorovg

hey we are here to help you out. Please don't be afraid to send me a message and ask for help and you too Tiffany

104. godorovg

Tiffany it is almost one in the morning here, must get some sleep talk with you latter.

105. tootie149

good night godorovg

106. tootie149

hay tiffanymak I have a word problem up can you take a look at it for me? please

107. tiffanymak1996