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  LiveWire / Teen Forums / School & Homework Connection / Adding Reply

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Topic Absolute Value- Number Line
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Original Post
KRNsoccerplayer24 Posted at 7:40 pm on Dec. 7, 2008
What would a number line look like with |5t+7|+8=17

I got not clue how to graph a number line for this. I KNOW i had a previous topic of the same stuff.  But there was a lot of confusion for me and i wanted to clear this up. Please only reply if you can help.

Replies
major Posted at 7:44 pm on Dec. 7, 2008
|5t+7|+8=17  
-8 -8

|5t+7|=9
from here it can be either
5t +7=9
5t=2
t=2/5
or
5t+7=-9
t=-16/5

it would just be those two points, unless you're doing an inequality

matto Posted at 7:42 pm on Dec. 7, 2008
|5t + 7| = 9
5t + 7 = 9 (t = 2/5)
5t + 7 = -9 (t = -16/5)

so it'll be a dot over -16/5 and a dot over 2/5, since those are the only two values that satisfy the equation

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