Question 418346
You can insert absolute value by using | | signs, done by doing Shift+\, or if you know how to insert formulas on this site using three curly braces, you can do something like abs(x).


If you have {{{abs(-2x-5) <= 9}}} we have {{{-9 <= -2x-5 <= 9}}}. Adding 5 to both sides,


{{{-4 <= -2x <= 14}}} Divide both sides by -2 (note to switch the inequality signs)


{{{2 >= x >= -7}}}, more commonly written as {{{-7 <= x <= 2}}}.