
Michael D. answered 05/23/19
Versatile STEM tutor eager to teach
If you are saying the following : (if not, then the following solution is wrong!)
| x - 4 | > y
Then you get rid of the absolute brackets and make 2 separate equations, switching the inequality and negating the right side of the equation for the 2nd :
Equation 1 : x - 4 > y
Equation 2 : x - 4 < -y
Solve Equation 1 : (add 4 to both sides)
x - 4 > y
x > y + 4
Solve Equation 2 : (add 4 to both sides)
x - 4 < -y
x < -y + 4
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Always check your work!
Set y = 40 (I selected a random number)
( x - 4 ) must be (>= 41) or (<= -41)
Solved Equation 1 ; x > 40 + 4... x > 44
This makes sense, because x would need to be 45 or greater in order for x - 4 >= 41
CORRECT!
Solved Equation 2 : x < -40 + 4.... x < -36
This makes sense, because x would need to be -37 or less in order for x - 4 <= -41
CORRECT!