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diff --git a/911/CH5/EX5.4/ex_5_4.sce b/911/CH5/EX5.4/ex_5_4.sce
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+// example 5.4//
+clc
+//clears the screen//
+clear
+//clears all existing variables//
+disp("we can SIMPLIFY the given equation as : ");
+disp('LET X= ABCD+ ABC''D''+ABCD''+ABC''D+ABCDE+ABC''D''E''+ABC''DE' );
+disp('It can further be simplified to: X= ABCD+ ABC''D''+ABCD''+ABC''D')
+disp(' Therefore, Y = AB' )
+disp('this says that output Y equals to AB' );
+\ No newline at end of file