Let x, y, z be three different positive integers each less than 20. What ... ...

Let x, y, z be three different positive integers each less than 20. What is the smallest possible value of expression Image?
(A)    –18
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Nova Math - Problem Set N: Inequalities

 
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Let x, y, z be three different positive integers each less than 20. What ... ... 
Posted: 01/01/2015 15:59
How come the answer is not -9?
 
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Let x, y, z be three different positive integers each less than 20. What ... ... 
Posted: 01/01/2015 15:59
Never mind I misread the question. Thanks.