anonymous
  • anonymous
Find the values of x in the following equation: |9x + 9| = 18
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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skullpatrol
  • skullpatrol
Do you want learn how to work with absolute values?
anonymous
  • anonymous
I just don't get it. >.<
skullpatrol
  • skullpatrol
Let me start with the definition: absolute value: The positive number of any pair of opposite nonzero real numbers is the absolute value of each number in the pair.

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skullpatrol
  • skullpatrol
This definition is stating that the absolute value is a POSITIVE number.
skullpatrol
  • skullpatrol
Let me show you with your question how to apply this definition.
anonymous
  • anonymous
Ah. I see. Thank you very much for helping me. I appreciate it. Continue, please. :3
skullpatrol
  • skullpatrol
|dw:1361364277172:dw|
anonymous
  • anonymous
See here http://www.wolframalpha.com/input/?i=abs%28x%29
skullpatrol
  • skullpatrol
Can you solve the equation $$9x +9 =18$$
skullpatrol
  • skullpatrol
Similarly we use the same argument for the opposite of 18 or -18....
anonymous
  • anonymous
With 9x + 9 = 18, the "x" stands for 3, right? :o
skullpatrol
  • skullpatrol
does 9(3) + 9 =?= 18
skullpatrol
  • skullpatrol
27 + 9 =36 =/=18
ParthKohli
  • ParthKohli
Think of it this way:|dw:1361365016230:dw|
anonymous
  • anonymous
So... The answer is 18x?
skullpatrol
  • skullpatrol
No, try and solve for x in $$9x + 9 = 18$$
skullpatrol
  • skullpatrol
|dw:1361365237300:dw|
skullpatrol
  • skullpatrol
@AriannaA Do you follow what I just did?
anonymous
  • anonymous
I'm really confused now.
skullpatrol
  • skullpatrol
Concentrate on ONLY solving the equation. Subtract 9 from both sides, then divide both sides by 9
skullpatrol
  • skullpatrol
|dw:1361365682344:dw|
anonymous
  • anonymous
|dw:1361365739823:dw|
anonymous
  • anonymous
What you have to do Arianna is get X by itself 9x + 9=18 To get this by itself you have to remove things from around the x. 9x + 9 = 18 What ever you do to the left side of the = sign you have to do to the right let em show you 9x + 9 = 18 - 9 - 9 --------------- 9x + 0= 9 /9 /9 /=divide 1x + 0 = 1 ------------- We read this as x = 1 so the answer is x = 1 now plug 1 into x 9(1) + 9 = 19 9 + 9 = 18 18=18 this is true
anonymous
  • anonymous
9x+9=18 and 9x+9=-18 this is taken from definition of the absolute value.
anonymous
  • anonymous
So 18=18 is the answer? I'm sorry if I'm being difficult.
anonymous
  • anonymous
x = 1 is the answer
anonymous
  • anonymous
you have to solve for x because x is the only thing we do not know here.
anonymous
  • anonymous
Oh. I see. :o
anonymous
  • anonymous
Do you understand how I got this answer?
skullpatrol
  • skullpatrol
Do you want me to continue?
skullpatrol
  • skullpatrol
@AriannaA Are you still there?

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