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airrbae Group Title

What is the solution for this system of linear equations? I'm stuck, y=-2x+1 y+7x-17 so -2x+1=7x-17 ??

  • one year ago
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  1. satellite73 Group Title
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    if the second one is \(y=7x-17\) then yes

    • one year ago
  2. satellite73 Group Title
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    \[-2x+1=7x-17\]

    • one year ago
  3. satellite73 Group Title
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    add \(2x\) to both sides add \(17\) to both sides divide both sides by \(9\) will get you \(x\)

    • one year ago
  4. satellite73 Group Title
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    if you want me to check your answer, let me know

    • one year ago
  5. airrbae Group Title
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    so I get 1=9x-17 then 9 divided 18 = 2? so x=2?

    • one year ago
  6. satellite73 Group Title
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    you got it

    • one year ago
  7. airrbae Group Title
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    how would I find y with this one?

    • one year ago
  8. satellite73 Group Title
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    then of course you have to find \(y\) but since you know \(x=2\) that should be easy

    • one year ago
  9. satellite73 Group Title
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    replace \(x\) by \(2\) in either equation if you want to check to make sure your answer is right, put \(2\) for \(x\) in both and see if you get the same number

    • one year ago
  10. airrbae Group Title
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    is y=15? or y=3? I got a different answer when I pluged 2 into both problems /:

    • one year ago
  11. satellite73 Group Title
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    should be the same lets check

    • one year ago
  12. satellite73 Group Title
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    \[y=-2x+1\] \[y=-2\times 2+1=-4+1=-3\]

    • one year ago
  13. satellite73 Group Title
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    \[y=7x-17\] \[y=7\times 2-17=14-17=-3\]

    • one year ago
  14. satellite73 Group Title
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    so you should get \(y=-3\) for both, i am not exactly sure how you got the 15

    • one year ago
  15. airrbae Group Title
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    okay now I see what I did wrong there, hmmm! thank you for showing both, I wouldn't have seen it if you hadn't!

    • one year ago
  16. satellite73 Group Title
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    yw

    • one year ago
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