SOLUTION: Y is less than or equal to the absolute value of 4-X. I know what to do when X is not negative like if it was Y is less than or equal to the absolute value of X-4. Can you help?

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Question 912598: Y is less than or equal to the absolute value of 4-X.
I know what to do when X is not negative like if it was Y is less than or equal to the absolute value of X-4. Can you help? Thank you.

Answer by josgarithmetic(39618)   (Show Source): You can put this solution on YOUR website!


Two cases. If and if .

CASE nonnegative argument




CASE negative argument






The solution is the region in the plane which ---deleted wording--- two cases.

SUMMARY OF THE INEQUALITES
Critical point seems to be for x=4.


The graphs show only the two individual cases; the ACTUAL solution is the region that ---deleted wording---.

Nonnegative argument case:


Negative argument case:


What the solution region should look like:


(About the deleted wording; either of the two individual inequalities will satisfy the absolute value inequality given. This is a union).

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