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anonymous

  • 5 years ago

someone please solve -2-10/3 my answer is not the same as the books?

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  1. anonymous
    • 5 years ago
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    i think the answer is -12/3 = -4

  2. anonymous
    • 5 years ago
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    if this is (-2) - 10/3 , then the first thing you want to do is get everything with the same denominator

  3. anonymous
    • 5 years ago
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    so -2 *3/3 = 6/3

  4. anonymous
    • 5 years ago
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    so the problem is really -6/3 - 10/3

  5. anonymous
    • 5 years ago
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    or -16/3

  6. anonymous
    • 5 years ago
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    does that make sense?

  7. anonymous
    • 5 years ago
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    yes thats what i got then you have to divide by 4. so then multiply by the reciprocal and i got -16/12 which simplifies to -4/3 right?

  8. anonymous
    • 5 years ago
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    hmmm, what do you mean divide by 4?

  9. anonymous
    • 5 years ago
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    well that was part of the equation. its x + 4z=-2 and x= 10/3

  10. anonymous
    • 5 years ago
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    oh I did not see that part. so you're solving for z

  11. anonymous
    • 5 years ago
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    yeah i didnt include it in my question but yeah solving for z

  12. anonymous
    • 5 years ago
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    so right 4z = -16/3

  13. anonymous
    • 5 years ago
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    so to isolate z, you divide both sides by 4

  14. anonymous
    • 5 years ago
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    so z = -16/(3*4) = -16/12 = -4/3

  15. anonymous
    • 5 years ago
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    also, go ahead and plug it back in to the equation

  16. anonymous
    • 5 years ago
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    thats exactly what i had but the book said 1/3

  17. anonymous
    • 5 years ago
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    since now you have both the x value, and the z value

  18. anonymous
    • 5 years ago
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    put them back in and make sure the equation holds true

  19. anonymous
    • 5 years ago
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    (even if you just use your calculator)

  20. anonymous
    • 5 years ago
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    the book said -1/3

  21. anonymous
    • 5 years ago
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    yeah ill try it

  22. anonymous
    • 5 years ago
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    if you put them back in, then 10/3 + 4*(-4/3) = - 2

  23. anonymous
    • 5 years ago
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    so 10/3 - 16/3 = -2

  24. anonymous
    • 5 years ago
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    -6/3 = -2

  25. anonymous
    • 5 years ago
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    -2 = -2

  26. anonymous
    • 5 years ago
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    so you were right, back of the book was wrong :p

  27. anonymous
    • 5 years ago
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    lol okay good cause that was really irritating me i was sitting there thinking "how am i wrong?!" ahah

  28. anonymous
    • 5 years ago
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    haha yeah =) it's good you questioned it :)

  29. anonymous
    • 5 years ago
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    thank you

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