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arw1998

  • 2 years ago

Is x= -1.75 the answer to this? I have already worked it out. I am just checking it. 4x+2(x+1)=9

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  1. hartnn
    • 2 years ago
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    6x +2 = 9 6x = 7 x= 7/6 x= 1.1667 how did u get -1.75 ?

  2. Jordan7
    • 2 years ago
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    first plug in your answer and if the answer matches up to 9 then thats your answer

  3. arw1998
    • 2 years ago
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    4x+2(x+1)=9 4x+2-2(x+1)=9-2 4x(x+1)=7 4x=7 4x/4=7/4 x=1.75 Sorry I meant to put positive 1.75 not negative. But I still have a feeling that my answer is incorrect.

  4. Jordan7
    • 2 years ago
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    well take 1.75 and plug it in for x and what do you get

  5. arw1998
    • 2 years ago
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    not 9. so im incorrect

  6. hartnn
    • 2 years ago
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    4x+2(x+1)=9 4x+2-2(x+1)=9-2 itself is incorrect. why did u subtract 2 ? and its not done properly

  7. arw1998
    • 2 years ago
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    okay. so what is the first step to do? I have not had math in about a year so I need some refreshing. My teacher gave us practice problems for the first day, so she didn't teach or go over anything, so I am very lost.

  8. hartnn
    • 2 years ago
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    4x+2(x+1)=9 1st step is to simplify 2(x+1) by distributing |dw:1389463858607:dw|

  9. arw1998
    • 2 years ago
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    so 2x?

  10. arw1998
    • 2 years ago
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    or 3x?

  11. hartnn
    • 2 years ago
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    |dw:1389464033269:dw|

  12. hartnn
    • 2 years ago
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    4x+2(x+1)=9 4x+2x+2=9 now subtract 2 from both sides.

  13. arw1998
    • 2 years ago
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    so it was 2x? And I have to keep the +2?

  14. hartnn
    • 2 years ago
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    4x+2x+2=9 4x+2x = 9-2 can u solve further ? 4x+2x = ???

  15. arw1998
    • 2 years ago
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    x=7/6

  16. hartnn
    • 2 years ago
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    yes, thats correct :)

  17. arw1998
    • 2 years ago
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    Thank you so much! I just didn't remember the distributive property part.

  18. hartnn
    • 2 years ago
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    you're welcome ^_^ keep practicing :)

  19. arw1998
    • 2 years ago
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    I definitely will. :)

  20. phi
    • 2 years ago
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    You check out Khan's videos to refresh your memory for example http://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-variables-expressions/cc-7th-manipulating-expressions/v/combining-like-terms-and-the-distributive-property In general, if you have a question, search his site for a pertinent video.

  21. arw1998
    • 2 years ago
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    Okay, thank you. :)

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