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anonymous

  • one year ago

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  1. Vocaloid
    • one year ago
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    well, let me copy the first problem down here for us to work on |dw:1440351722236:dw|

  2. Vocaloid
    • one year ago
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    first thing I can see do do straight away is to simplify the first fraction by cancelling out those 3's |dw:1440351817587:dw|

  3. Vocaloid
    • one year ago
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    next step is to take a look at our denominators: x (x+4) and 7x the LCD of these is just x(x+4)(7x) so we want to multiply both sides by x(x+4)(7x)

  4. Vocaloid
    • one year ago
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    |dw:1440351894767:dw|

  5. Vocaloid
    • one year ago
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    then we cancel out terms when we can |dw:1440351945962:dw|

  6. anonymous
    • one year ago
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    k

  7. anonymous
    • one year ago
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    im writing this down so i remember XD

  8. Vocaloid
    • one year ago
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    |dw:1440351985342:dw|

  9. anonymous
    • one year ago
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    then just solve?

  10. Vocaloid
    • one year ago
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    yup, can you take it from here?

  11. anonymous
    • one year ago
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    hold on

  12. anonymous
    • one year ago
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    i got 0,3

  13. Vocaloid
    • one year ago
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    gimme a sec

  14. Vocaloid
    • one year ago
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    ok, so I agree that you get x = 0 and x = 3 when you solve; however, one of these is an extraneous solution notice what happens when you plug in x = 0 back into the equation

  15. anonymous
    • one year ago
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    Yeah 0 is extraneous so its B

  16. Vocaloid
    • one year ago
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    yup, great work

  17. Vocaloid
    • one year ago
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    ready for the next one?

  18. anonymous
    • one year ago
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    yep. Thank you for doing this btw

  19. Vocaloid
    • one year ago
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    ok, so we have (7/8) - (1/x) = (3/4) let's start by subtracting (3/4) from each side

  20. anonymous
    • one year ago
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    what would you subtract 3/4 from?

  21. Vocaloid
    • one year ago
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    well, the left side is (7/8) - (1/x) and the right side is (3/4) so, let's start by subtracting (3/4) from the left side (7/8) - (1/x) - (3/4) = ?

  22. anonymous
    • one year ago
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    i got 8?

  23. Vocaloid
    • one year ago
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    yes, x = 8

  24. anonymous
    • one year ago
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    so D?

  25. Vocaloid
    • one year ago
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    yup

  26. anonymous
    • one year ago
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    k hold on a sec

  27. anonymous
    • one year ago
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    can you check one for me?

  28. Vocaloid
    • one year ago
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    sure

  29. anonymous
    • one year ago
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    k let me snip it

  30. anonymous
    • one year ago
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    i got 8, or A

  31. Vocaloid
    • one year ago
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    just a sec

  32. anonymous
    • one year ago
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    lol i just got mentioned

  33. Vocaloid
    • one year ago
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    yeah I agree, x = 8

  34. mathstudent55
    • one year ago
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    |dw:1440357921426:dw|

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