A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

Solve for x: −3|x + 7| = −12 x = 5 over 3, x = −19 over 3 x = −3, x = −11 x = −3, x = 11 No solution

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

    I see that you are posting these types of questions. Do you know how to solve them?

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

    no

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

    One of my good ways would be to actually plug in the numbers

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

    how do i do that ?

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

    I will teach that to you. Do you know what the absolute value symbols mean?

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

    that whats inside it is positive ?

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

    Yes or, in other words, the distance from that number and 0 (that's why it's positive).

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

    So what will happen to the negative numbers once you plug them inside of the absolute value?

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

    they will become positive

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

    Good.

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

    Now let's work with the first option.

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

    okay

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

    Actually for the sake of time, let's do the second one.

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

    haha alright

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

    If we first plug in -3 for x. \[-3|-3+7|\] First, we need to work with the numbers inside of the parenthesis. what is -3 + 7?

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

    sorry not the parenthesis, i meant the absolute value symbols.

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

    in other words, what is the absolute value of -3 + 7?

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

    did you get the answer?

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

    how would i get the absolute value of that?

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

    x: −3|x + 7| = −12 divide both sides by -3 |x + 7| = 4 now the left side is positive but the x + 7 can be negative or positive so we have x + 7 = 4 or x + 7 = -4 solve these 2 equations

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

    -3 + 7 = 4 absolute value would just be 4

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

    i got x = -3, x= -11

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

    there are 2 answers they are the solutions of x + 7 = 4 and x + 7 = -4

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

    i'm sure you can solve these 2 simple equations ?

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

    i got that answer that i posted above

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

    i got -3 for the first equation and -11 for the second

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

    right

  28. 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.