SOLUTION: |3x+2|> 8

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Question 243036: |3x+2|> 8
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!

abs%283x%2B2%29%3E8 Start with the given inequality


Break up the absolute value (remember, if you have abs%28x%29%3E+a, then x+%3C+-a or x+%3E+a)

3x%2B2+%3C+-8 or 3x%2B2+%3E+8 Break up the absolute value inequality using the given rule




Now lets focus on the first inequality 3x%2B2+%3C+-8


3x%2B2%3C-8 Start with the given inequality


3x%3C-8-2Subtract 2 from both sides


3x%3C-10 Combine like terms on the right side


x%3C%28-10%29%2F%283%29 Divide both sides by 3 to isolate x



Now lets focus on the second inequality 3x%2B2+%3E+8


3x%2B2%3E8 Start with the given inequality


3x%3E8-2Subtract 2 from both sides


3x%3E6 Combine like terms on the right side


x%3E%286%29%2F%283%29 Divide both sides by 3 to isolate x



x%3E2 Divide



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Answer:

So our answer is

x+%3C+-10%2F3 or x+%3E+2


which looks like this in interval notation





if you wanted to graph the solution set on a number line, you would get


Graph of the solution set in blue and the excluded values represented by open circles