SOLUTION: Solve each inequality. Graph the solutions. 5|2b+1|-3< 7 - the < is like 7 is greater than or equal to -

Algebra ->  Inequalities -> SOLUTION: Solve each inequality. Graph the solutions. 5|2b+1|-3< 7 - the < is like 7 is greater than or equal to -       Log On


   



Question 158239: Solve each inequality. Graph the solutions.
5|2b+1|-3< 7
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the < is like 7 is greater than or equal to
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Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!

5%2Aabs%282b%2B1%29-3%3C=7 Start with the given inequality


5%2Aabs%282b%2B1%29%3C=10 Add 3 to both sides.


abs%282b%2B1%29%3C=2 Divide both sides by 5



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

2b%2B1+%3E=+-2 and 2b%2B1+%3C=+2 Break up the absolute value inequality using the given rule


-2+%3C=+2b%2B1+%3C=+2 Combine the two inequalities to get a compound inequality



-3+%3C=+2b+%3C=+1 Subtract 1 from all sides


-3%2F2+%3C=+b+%3C=+1%2F2 Divide all sides by 2 to isolate b



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Answer:

So our answer is

-3%2F2+%3C=+b+%3C=+1%2F2



So the answer in interval notation is []


and the answer in set-builder notation is


Here's the graph of the solution set

Graph of the solution set

Note:
There is a closed circle at b=-3%2F2+ which means that we're including this value in the solution set
Also, there is a closed circle at b=+1%2F2 which means that we're including this value in the solution set.