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anonymous

  • one year ago

Consider this system of linear equations: y − x = -13 -4x + 3y = -51

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  1. anonymous
    • one year ago
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    choices (-12,1) (-12,-1) (12,-1)

  2. anonymous
    • one year ago
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    Hi! I think I can help you with this :)

  3. anonymous
    • one year ago
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    First of all, any ideas about how to get started, or are you completely stuck?

  4. anonymous
    • one year ago
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    im completelty stuck on the lesson its self :(

  5. anonymous
    • one year ago
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    Okay, no problem!

  6. anonymous
    • one year ago
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    ok

  7. anonymous
    • one year ago
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    I can think of two possible ways to answer this question. One way would be to try and solve the equations yourself. Alternatively, we could just try each of the multiple choice answers and see which one works.

  8. jameshorton
    • one year ago
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    mines say 0,0

  9. anonymous
    • one year ago
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    Any preference?

  10. anonymous
    • one year ago
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    im thinking that it is -12,1

  11. pooja195
    • one year ago
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    Id start with adding x to both sides y − x +x= -13+x y=-13+x The subtitute the y value in place of 3y -4x + 3(-13+x) = -51 <---solve for x

  12. anonymous
    • one year ago
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    that looks confusing

  13. pooja195
    • one year ago
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    Not at all :) \[\huge~\rm~-4x + 3(-13+x) = -51 \] Distribute the 3 \[\huge~\rm~ 3(-13+x) \]

  14. anonymous
    • one year ago
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    -39+3x

  15. pooja195
    • one year ago
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    Good -39+3x \[\huge~\rm~-4x -39+3x = -51 \] Combine like terms

  16. anonymous
    • one year ago
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    im confused

  17. pooja195
    • one year ago
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    See the x's ? Combine them since they are like terms -4+3=?

  18. anonymous
    • one year ago
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    -1x

  19. pooja195
    • one year ago
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    Good now add −x−39+39=−51+39 -51+39=?

  20. anonymous
    • one year ago
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    -12

  21. anonymous
    • one year ago
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    right?

  22. pooja195
    • one year ago
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    its just 12

  23. anonymous
    • one year ago
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    no bevause 51 is negative.

  24. pooja195
    • one year ago
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    a negative divided by a negative is a postivie

  25. anonymous
    • one year ago
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    but its not divided its added

  26. pooja195
    • one year ago
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    Answer what i asked you -51+39=?

  27. anonymous
    • one year ago
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    -12

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