Join the Meeting Place for Moms!
Talk to other moms, share advice, and have fun!

(minimum 6 characters)

I need help with math ASAP :(

I have a test today and I'm reviewing and I'm at a part that DH and I didn't make it to when he was helping me, and now he's at work.
"Solve each equation or inequality"
and here's the problem: 3|4-3x|-4=8

I can solve something like |2x+4|= whatever, but I'm having issues with the ones set up like the one I'm working on and it isn't explained in the book and I have NO idea where I'm going wrong! There are supposed to be 2 answers in (set notation?) {number,number} format. I think I got one of them, but I'm not sure. Help please?

 
Mrs.BAT

Asked by Mrs.BAT at 11:09 AM on Mar. 14, 2011 in

Level 38 (105,028 Credits)
This question is closed.
Answers (4)
  • 3|4-3x|-4=8
    3|4-3x|=12 <--add 4 to both sides
    4-3x=4 <---Divide by 3 for both sides
    -3x=0 <---Subtract 4 from both sides
    x=0 <---Divide by -3

    If you put 0 into the equation to double check:
    3|4-3x|-4=8
    3|4-3(0)|-4=8
    3|4-0|-4=8
    3(4)-4=8
    12-4=8
    8=8
    laird6372

    Answer by laird6372 at 11:19 AM on Mar. 14, 2011

  • It's been a little bit since I've had to this, but I think you either have to:
    A.) Distribute 1st: 3x4 and 3x-3x
    B.) Take it out of set notation 1st... Which I believe is -4+3x
    Sorry if I'm wrong.
    Tink05215

    Answer by Tink05215 at 11:14 AM on Mar. 14, 2011

  • my brain hurts from just reading this question....goodluck
    knicole0708

    Answer by knicole0708 at 11:22 AM on Mar. 14, 2011

  • THANK YOU!!! I feel so dumb, but my brain really isn't working today (I only slept an hour last night). It's been almost 3 years since I've done this, and I wasn't good at it then lol. You are SUCH a life saver!

    Btw... If I get stuck on something dumb again can I send you a message lol? I feel horrible asking that, but I really don't have anyone to ask right now and I won't be able to before I take this test.
    Mrs.BAT

    Comment by Mrs.BAT (original poster) at 11:23 AM on Mar. 14, 2011

Next question in
Rosetta Stone

Next question overall (General Parenting)
Red Tender Spot on Left Breast