Equation with Absolute Value
Date: 3/25/96 at 22:47:57 From: Bernard Brill Subject: HELP! I am an 8th grade student who is taking Algebra 2. I have problems solving equations with absolute value and graphing on a number line. example: |2n-6|> 5 My teacher said I have to factor out the 2, but I am really confused. Please help!
Date: 3/28/96 at 23:14:28 From: Doctor Steven Subject: Re: HELP! Here's how you solve inequalities with absolute values in them: Take the inequality |3x - 9| > 4. Step 1) Set it up like this: -4 > 3x - 9 or 4 < 3x - 9. Step 2) Add 9 to both sides of both inequalities to get: 5 > 3x or 13 < 3x Step 3) 5/3 > x or 13/3 < x Step 4) Put in familiar form to get: x < 5/3 or x > 13/3. Now all you have to do is graph the solution on the number line. Hope this helps. -Doctor Steven, The Math Forum
Search the Dr. Math Library:
Ask Dr. MathTM
© 1994-2013 The Math Forum