## tootie149 3 years ago lost yet again -4/5x=3/5

1. tootie149

help

2. tootie149

I got -12/25 but this does not work when i plug it in

3. lgbasallote

is that $\huge -\frac 45 x = \frac 35$

4. tootie149

yes, it is how did you type in the fraction?

5. lgbasallote

try clicking the equation button by the comment box...you should see the fraction command there

6. lgbasallote

anyway if you multiply both sides by 5 what do you get?

7. tootie149

ok i see it now thanks

8. lgbasallote

welcome

9. tootie149

for the -4/5 * 5 =-4 and 3/5*5=3

10. lgbasallote

yes dont forget x

11. tootie149

x=-4/3

12. tootie149

wow I get so lost so quick

13. lgbasallote

it's not -4/3

14. tootie149

y, what did i do wrong

15. lgbasallote

i assume you tried to solve it mentally. that's what you did wrong. do it step by step

16. tootie149

ok give me a min

17. lgbasallote

sure

18. tootie149

do i flip the -4/5 when I isolate the x like this -4/5x=3/5 x= 3/5 div -5/4

19. lgbasallote

$\huge -\frac 45 x = \frac 35$ you start by multiplying both sides by 5

20. tootie149

y 5

21. tootie149

is it because both of the fraction have 5?

22. lgbasallote

you multiply both sides by 5 because x has a denominator of 5

23. tootie149

ok so this gets rid of the fractions

24. tootie149

right ?

25. lgbasallote

yes. so what does the equation look like after?

26. tootie149

-4x=3 ?

27. lgbasallote

right. so now what would you do?

28. tootie149

div both sides by -4

29. tootie149

-0.75

30. tootie149

x=0.75

31. tootie149

32. lgbasallote

yes that is right. but you should but it in fraction for

33. tootie149

-4/3

34. lgbasallote

form*

35. lgbasallote

how did you get -4/3? (after i said it wasnt right)

36. tootie149

1 1/3 sorry

37. tootie149

looked at the wrong part of my paper

38. tootie149

1/3

39. lgbasallote

....what did you get again after you divided by 5?

40. tootie149

-4x=3

41. lgbasallote

so what did you after that?

42. simplicity

-4x/5=3/5 =>-4x=3*5/5 =>-4x=3 =>x=-3/4

43. lgbasallote

what did you do*

44. tootie149

-3/4

45. tootie149

wow I have been typing it upside down

46. lgbasallote

what were you doing to get -4/3?

47. tootie149

forgot to div both sides by -4 and because i can not reduce -3/4 that is my answer

48. lgbasallote

you need to remember that you divide both sides by the coefficient of x ALWAYS... in this case your coefficient is 4..that's why you divide both sides by 4

49. tootie149

because what i do to one side I do to the other

50. tootie149

in order to get x alone I div -4x by -4 and I div 3 by -4 also this gives me -3/4

51. godorovg

guys this problem is simple -4/5x=3/5 take the -4/5 and divide by 3/5 so you have X= -4/5 divided by 3/5 now flip the 3/5 to 5/3 so that is to change the divide to times so now you have -4/5 times 5/3= ??

52. tootie149

-4/3

53. tootie149

I am so wrong just looked at it

54. lgbasallote

uhhh what?

55. lgbasallote

56. tootie149

IDK!!!!!!!!

57. tootie149

sorry for yelling

58. lgbasallote

lol

59. lgbasallote

you have -4x = 3 you said you divide by =4 so what happens if you do that?

60. tootie149

the web site wolfram alfa said it is -4/3

61. lgbasallote

could you post the URL of that wolframalpha?

62. tootie149
63. godorovg

no need that is right -4/3 that is what I got when I worked the problem out as well.look at my post where I went step by step through this problem.

64. tootie149

reduced form is 1and 1/3

65. nickhouraney

nooo

66. lgbasallote

you told be the problem was $\huge -\frac 45 x = \frac 35$ what you posted in wolframalpha was $\huge -\frac{4}{5x} = \frac 35$ see the difference/

67. lgbasallote

you told me*

68. tootie149

no

69. lgbasallote

in the first one, the x is in the numerator. In the second one, the x is in the denominator

70. lgbasallote

so which one is it?

71. godorovg

what is this again??

72. tootie149

the x is off to the side of the side like -4/4(x)

73. lgbasallote

then like i said -4/3 is wrong

74. lgbasallote

this is how you type it in wolfram http://www.wolframalpha.com/input/?i=-4%2F5+x%3D3%2F5

75. lgbasallote

wolfram is very meticulous and choosy so you have to wrie the question properly

76. lgbasallote

got it now?

77. lgbasallote

@tootie149 are you still there?

78. TheViper

$\huge -\frac 45 x = \frac 35$ $$\LARGE{-4x=\frac{3\times5}{5}}$$ $$\LARGE{-4x=3}$$ $$\LARGE{x=\frac{3}{-4}}$$