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LonelyandForgotten

  • one year ago

i need help with this huge problem :(

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  1. LonelyandForgotten
    • one year ago
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  2. hartnn
    • one year ago
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    to eliminate the fraction, you can multiply by 3 on both sides.

  3. LonelyandForgotten
    • one year ago
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    multiply 3 by what?

  4. hartnn
    • one year ago
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    multiply both sides of the equation by 3

  5. LonelyandForgotten
    • one year ago
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    @Best_Mathematician that isn't exatly the answer i was looking for...

  6. LonelyandForgotten
    • one year ago
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    so 5 and 12?

  7. Best_Mathematician
    • one year ago
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    my mistake here's the correction 5n + 12 + n = -3 6n = -15 n = -5/2

  8. LonelyandForgotten
    • one year ago
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    1.5?

  9. LonelyandForgotten
    • one year ago
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    do you have to simplify that?

  10. hartnn
    • one year ago
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    n=1.5 or 3/2 is incorrect.

  11. LonelyandForgotten
    • one year ago
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    but theres no such thing as 1.5 here :(

  12. hartnn
    • one year ago
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    do you want to solve it on your own, or just want an answer ?

  13. LonelyandForgotten
    • one year ago
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    yeahh thats what i was thinking, it cant be right :/

  14. LonelyandForgotten
    • one year ago
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    i need to know the steps so i can do it on my own you guys are just throwing answers or these problems of how you think it should be solved. its just confusing to me

  15. hartnn
    • one year ago
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    i know, right! if you multiply each term of that equation by 3, what u get ? 3* (1/3)* (5n+12) =...? 3* (1/3)* n =...? -3*3 =.... ?

  16. hartnn
    • one year ago
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    *last line should be -1*3=...?

  17. LonelyandForgotten
    • one year ago
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    -3?

  18. hartnn
    • one year ago
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    thats right side, what about left side of = ?

  19. LonelyandForgotten
    • one year ago
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    umm 3*5?

  20. LonelyandForgotten
    • one year ago
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    15

  21. LonelyandForgotten
    • one year ago
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    sorry i am just terrible at math

  22. hartnn
    • one year ago
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    3* (1/3)* (5n+12) =5n+12 3* (1/3)* n =n got this ?

  23. hartnn
    • one year ago
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    |dw:1362988262501:dw| sorry i am just terrible at drawing :P

  24. LonelyandForgotten
    • one year ago
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    haha no problem! :D

  25. LonelyandForgotten
    • one year ago
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    so i subtract 5 from twelve here?

  26. LonelyandForgotten
    • one year ago
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    7 ?

  27. hartnn
    • one year ago
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    |dw:1362988334714:dw| so, you are left with simple linear equation : 5n+12+n = -3

  28. hartnn
    • one year ago
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    you can't subtract 5 from 12...there is 'n' attached to 5

  29. hartnn
    • one year ago
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    combine like terms, 5n+n = 6n

  30. hartnn
    • one year ago
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    so, 6n +12=-3

  31. LonelyandForgotten
    • one year ago
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    oh, so you divide that? i thought you have to subtract because it is opposite of addition :P

  32. hartnn
    • one year ago
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    now , subtract 12 from both sides, (because subtraction is opposite of addition) so, 6n +12-12 = -3-12 6n = -15 now just divide by 6

  33. LonelyandForgotten
    • one year ago
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    -2.5

  34. hartnn
    • one year ago
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    because division is opposite of multiplication, ...yes, thats correct :)

  35. LonelyandForgotten
    • one year ago
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    hmm thanks for the help so far! :) so how do you make that a fraction?

  36. hartnn
    • one year ago
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    6n = -15 n = -15/6 = -3*5 /(3*2) 3 cancels out. n = -5/2

  37. LonelyandForgotten
    • one year ago
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    this will take me a while to learn but i really dont want to waste your time..thank you for this, i will look over it because its got all the help i need :) so thanks :D

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