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pinkmommy

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  • one year ago
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  1. avery23
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    All you need to do is solve for x in the second equation, and you will get one of the answers.

    • one year ago
  2. avery23
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    You should get x=8-y. First add y to the other side, and then divide through by -1.

    • one year ago
  3. Rosh007
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    you need to substitute tha value of x into first equation....from second equation.. can you tell me what is your second euation?

    • one year ago
  4. avery23
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    You are just trying to find what equation you would substitute in.

    • one year ago
  5. Rosh007
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    ok.. here your question says what expression would you substitute into the first equation? that means you just need to find the value to substitue so that you can solve later on BUt you have solved it by following the example in your note

    • one year ago
  6. avery23
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    You did that right, but its just wanting you to isolate the second equation for x,i.e. solve for x and that is what your answer should be. The question is not wanting you to work it out. Just find what you are sustituting in.

    • one year ago
  7. avery23
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    Yes.

    • one year ago
  8. Rosh007
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    so let us go back to the first step... can you just tell me which is first uqtion and second equation.. (it is obivious fromthe options... but I want you to know what you are doing)

    • one year ago
  9. pinkmommy
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    i didnt know 8-y was the answer it was a guess first 2x + y = 9 second -x - y = -8

    • one year ago
  10. Rosh007
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    yes... now your question says "what expression would you substitute into the first equation? ".... can you tllme what that means?

    • one year ago
  11. Rosh007
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    *tell me

    • one year ago
  12. pinkmommy
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    -x - y = -8?

    • one year ago
  13. Rosh007
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    yes.. ok.. let me help you it means.. you need to find a value to substitute in first equation.. and only we have second equation is left... you are correct

    • one year ago
  14. Rosh007
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    now look at the options... which variable is there in options

    • one year ago
  15. pinkmommy
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    y

    • one year ago
  16. Rosh007
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    yup... so... you have to substitue a value which contain... y.... and also from second equation... so which variable has to be replaced?

    • one year ago
  17. pinkmommy
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    x?

    • one year ago
  18. Rosh007
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    Yes... and reason?

    • one year ago
  19. pinkmommy
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    eliminate to find y? idk

    • one year ago
  20. Rosh007
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    yes... exactly right?.... so how you can find that value of x from second equation

    • one year ago
  21. Rosh007
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    **Exactly right

    • one year ago
  22. pinkmommy
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    so how do i start doing it?

    • one year ago
  23. Rosh007
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    ok..so we have second equation.. and ar you convinced that w have to eliminate x and we can do that from second equation?

    • one year ago
  24. pinkmommy
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    huh?

    • one year ago
  25. Rosh007
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    means we need to find the value of x ( since option is interms of y) to substitute (sorry for my bad english)

    • one year ago
  26. pinkmommy
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    thats fine. how do i do that?

    • one year ago
  27. Rosh007
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    what expression would you substitute into the first equation? -- from question we have second equation and can you tll me onc again what was second equation?

    • one year ago
  28. pinkmommy
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    -x-y=-8

    • one year ago
  29. Rosh007
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    welll... what is -x = ???

    • one year ago
  30. pinkmommy
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    -1

    • one year ago
  31. pinkmommy
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    not trying to rush you but can you hurry && show me how to do this bc my son needs me right now. please && thank you :)

    • one year ago
  32. Rosh007
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    can you check again... Clue ( the equality will not change when same number is added or subtracted or divided or multiplied)

    • one year ago
  33. Rosh007
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    mmmm...ok... add -y to both sides of equal sign what you get?

    • one year ago
  34. pinkmommy
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    y = -8 - x

    • one year ago
  35. Rosh007
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    -y and + y cancels so what is left?

    • one year ago
  36. pinkmommy
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    i gotta go sorry. thanks for all of your help.

    • one year ago
  37. Rosh007
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    Ok I will write the steps.. so if you have any doubt can post here

    • one year ago
  38. Rosh007
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    sorry this is corrct -x-y+y =-8+y (not -8-y, i made a mistak there) now -x = -8+y multiply both side by - sign we get x = 8-y which is th answer i am so sorry that I had to right the steps directly.. but hope you will commet.. if this dosn't get you..

    • one year ago
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