SOLUTION: Solve the following inequality and list your solution using interval notation: |-3x – 5| > 10

Algebra ->  Inequalities -> SOLUTION: Solve the following inequality and list your solution using interval notation: |-3x – 5| > 10       Log On


   



Question 115273: Solve the following inequality and list your solution using interval notation:
|-3x – 5| > 10

Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
abs%28-3x-5%29%3E10 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-5+%3C+-10 or -3x-5+%3E+10 Break up the absolute value inequality using the given rule




Now lets focus on the first inequality -3x-5+%3C+-10


-3x-5%3C-10 Start with the given inequality


-3x%3C-10%2B5Add 5 to both sides


-3x%3C-5 Combine like terms on the right side


x%3E%28-5%29%2F%28-3%29 Divide both sides by -3 to isolate x (note: Remember, dividing both sides by a negative number flips the inequality sign)



x%3E5%2F3 Reduce


Now lets focus on the second inequality -3x-5+%3E+10


-3x-5%3E10 Start with the given inequality


-3x%3E10%2B5Add 5 to both sides


-3x%3E15 Combine like terms on the right side


x%3C%2815%29%2F%28-3%29 Divide both sides by -3 to isolate x (note: Remember, dividing both sides by a negative number flips the inequality sign)



x%3C-5 Divide



----------------------------------------------------

Answer:

So our answer is

x+%3E+5%2F3 or x+%3C+-5


which looks like this in interval notation





if you wanted to graph the solution set, you would get

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