A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

What is the solution to the equation? -8x + 9x - 21 = -12 - 16 { }

  • This Question is Closed
  1. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    -12 - 16 = -28 -8 + 9 - 21 = -20 X = ?

  2. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    not -2 that would = 23

  3. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    -8 is also a no

  4. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    @Nnesha

  5. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    \(\color{blue}{\text{Originally Posted by}}\) @Demonx341 -12 - 16 = -28 -8 + 9 - 21 = -20 X = ? \(\color{blue}{\text{End of Quote}}\) you can't `can't` combine -9and -8 with -21

  6. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ? its -8 + 9 - 21

  7. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    they are not like terms you can't combine variable term with just number

  8. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    oh XD

  9. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    it's -8x+9x-21 combine like terms here is an example 2x+2x +5= 4x+5 i can't combine 4x with 5

  10. ryanwhite499
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Let's solve your equation step-by-step. −8x+9x−21=−12−16 Step 1: Simplify both sides of the equation. −8x+9x−21=−12−16 Simplify: (Show steps) x−21=−28 Step 2: Add 21 to both sides. x−21+21=−28+21 x=−7 Answer: x=−7

  11. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    -8x + 9x = 1x

  12. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    let him do it.

  13. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    btw i have to find out what x = XD

  14. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    It would Be -7 Tho :P

  15. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    yes right x -21=-28 right now move the 21 to the right side

  16. ryanwhite499
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Yes... In my equation... x = -7

  17. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ok XD

  18. ryanwhite499
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Great Work!

  19. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    -28 - 21 = -49

  20. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    nope how would you cancel out -21 from left side would you add ,subtract ,divide or multiply ?

  21. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    add

  22. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    -28 + 21= -7

  23. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    looks good!

  24. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    1*-7 = -7 xD

  25. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    now you can check ur answer substitute x for -7 \[\huge\rm -8(-7)+9(-7)-21=-12-16\] both sides are equal good to go!

  26. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    :P both = -28

  27. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    yes right that means x=-7 is correct good work!

  28. ryanwhite499
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Demon you need to fan me in order for me to send messages back

  29. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    XD forgot about that

  30. ryanwhite499
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Sorry. Please continue

  31. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.