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

1. anonymous

help

2. anonymous

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. anonymous

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. anonymous

ok i see it now thanks

8. lgbasallote

welcome

9. anonymous

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

10. lgbasallote

yes dont forget x

11. anonymous

x=-4/3

12. anonymous

wow I get so lost so quick

13. lgbasallote

it's not -4/3

14. anonymous

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. anonymous

ok give me a min

17. lgbasallote

sure

18. anonymous

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. anonymous

y 5

21. anonymous

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. anonymous

ok so this gets rid of the fractions

24. anonymous

right ?

25. lgbasallote

yes. so what does the equation look like after?

26. anonymous

-4x=3 ?

27. lgbasallote

right. so now what would you do?

28. anonymous

div both sides by -4

29. anonymous

-0.75

30. anonymous

x=0.75

31. anonymous

32. lgbasallote

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

33. anonymous

-4/3

34. lgbasallote

form*

35. lgbasallote

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

36. anonymous

1 1/3 sorry

37. anonymous

looked at the wrong part of my paper

38. anonymous

1/3

39. lgbasallote

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

40. anonymous

-4x=3

41. lgbasallote

so what did you after that?

42. anonymous

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

43. lgbasallote

what did you do*

44. anonymous

-3/4

45. anonymous

wow I have been typing it upside down

46. lgbasallote

what were you doing to get -4/3?

47. anonymous

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. anonymous

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

50. anonymous

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

51. anonymous

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. anonymous

-4/3

53. anonymous

I am so wrong just looked at it

54. lgbasallote

uhhh what?

55. lgbasallote

56. anonymous

IDK!!!!!!!!

57. anonymous

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. anonymous

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

61. lgbasallote

could you post the URL of that wolframalpha?

62. anonymous
63. anonymous

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. anonymous

reduced form is 1and 1/3

65. anonymous

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. anonymous

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. anonymous

what is this again??

72. anonymous

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

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