Answer:
( - ∞, 1] U [3, ∞)
In other words,
Explanation:
To solve the system given, we first get rid of the absolute value sign and decompose the inequality into two
Let is solve the two inequalities
add 8 to both sides to get
finally, divide both sides by 4 to get
Now for the second inequality
adding 8 to both sides gives
Finally, dividing both sides by 4 gives
Hence, the solution to the system is
which can be written as