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anonymous

  • 5 years ago

I need help solving a couple of Beginning Algebra equations. -1/3 = x - 3/5

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  1. LollyLau
    • 5 years ago
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    you wanna get rid of any fractions by multiplying all the terms by their denominators. so the whole equation becomes: -5=15x-9. -15x=-4 15x=4 x=4/15

  2. anonymous
    • 5 years ago
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    So -1/3 . - 3/5 = 3/15 The fractions is what gets me. But thank you.

  3. anonymous
    • 5 years ago
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    this is so you can cancel the -3 / 5

  4. anonymous
    • 5 years ago
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    Ok so you multipy on both sides the -1/3

  5. anonymous
    • 5 years ago
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    multiply it with a - 5/ 3

  6. anonymous
    • 5 years ago
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    you have -1/3 = x - 3/5 it would be better to multiply it in 1 go and simplify

  7. anonymous
    • 5 years ago
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    multiply with reciprocal of -3/5 it would be easier you could do -1/3 reciprocal but it would be more work

  8. anonymous
    • 5 years ago
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    So either side is ok? I didn't know that. Thank you!

  9. anonymous
    • 5 years ago
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    yup

  10. anonymous
    • 5 years ago
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    :)

  11. anonymous
    • 5 years ago
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    any other questions?

  12. anonymous
    • 5 years ago
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    Yes I have another equation 3x = 2x + 7

  13. anonymous
    • 5 years ago
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    since if you multiply for example a equation by -1 you have to do so to both sides you know that right?

  14. anonymous
    • 5 years ago
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    No Im so lost right now.

  15. anonymous
    • 5 years ago
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    o okies you know what this sign = means right?

  16. anonymous
    • 5 years ago
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    equals yes lol

  17. anonymous
    • 5 years ago
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    it means is equal to

  18. anonymous
    • 5 years ago
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    the equation 3x=2x+7 it reads 3x is equal to 2x plus 7

  19. anonymous
    • 5 years ago
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    so do you kinda understand what this is know

  20. anonymous
    • 5 years ago
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    now*

  21. anonymous
    • 5 years ago
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    how it works

  22. anonymous
    • 5 years ago
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    Yes I know we have to combine like terms but when I did it I came up with the wrong answer

  23. anonymous
    • 5 years ago
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    I came up with 1x

  24. anonymous
    • 5 years ago
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    not like terms but equal amounts just think of it like this you got a 2 ml cups of water A and B they are supposed to be equal if you add 4 pints to cup A Will they still be equal? How will you make them equal? Add 4 pints to cup B right? what is the symbol of adding? its a plus sign + 4 pints

  25. anonymous
    • 5 years ago
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    yes

  26. anonymous
    • 5 years ago
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    is it more understandable?

  27. anonymous
    • 5 years ago
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    a little so do i add the 2x to 3x or am I still off base?

  28. anonymous
    • 5 years ago
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    2x = 3x + 7 what would be the easiest method try to make it simpler for you self yes , correct make the like terms dissapear

  29. anonymous
    • 5 years ago
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    I did it like this: 3x = 2x + 7 -2x -2x

  30. anonymous
    • 5 years ago
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    I know the answer is 7 from looking in the back of the book just can't figure out how to get the answer to 7

  31. anonymous
    • 5 years ago
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    additive inverse of 2x is negative 2x do this on both sides

  32. anonymous
    • 5 years ago
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    yes I did that

  33. anonymous
    • 5 years ago
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    x cannot be negative

  34. anonymous
    • 5 years ago
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    how would you get a positive x?

  35. anonymous
    • 5 years ago
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    I"m not sure but I think the +3x -2x should egual a positive but that is 5x

  36. anonymous
    • 5 years ago
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    umm you sure the problem was 2x = 3x + 7

  37. anonymous
    • 5 years ago
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    not - 7

  38. anonymous
    • 5 years ago
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    no the problem is 3x =2x + 7

  39. anonymous
    • 5 years ago
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    answer is 7 but don't see how to get that answer.

  40. anonymous
    • 5 years ago
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    okies here is what i get 3x = 2x +7 (-2 x) 3x = 2x + 7 + (-2x) additive inverse of 2x

  41. anonymous
    • 5 years ago
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    can you figure the rest :)

  42. anonymous
    • 5 years ago
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    yes thank you

  43. anonymous
    • 5 years ago
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    anything else?

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