finding dupliates in multiple columns

[excelNewbie22]

hi,
i need to know which duplicates there are in col e in combine with cells d1:a1
in order for me mark them all and then delete the duplicates in the entire range e1:a1, e2:a2 and etc
can you please help?

test
	A	B	C	D	E
1	6	3	5	4	4536
2	2	3	8	3	3832
3	2	8	1	2	2182
4	3	2	1	2	2123
5	8	5	5	5	5558
6	2	3	8	3	3832
7	7	1	3	1	1317
8	6	3	5	4	4536
test

Cell Formulas
Range	Formula
E1:E8	E1	=D1&C1&B1&A1

 

[excelNewbie22]

found this:

Excel Conditional Formatting Based on Another Cell - Excel University

Explore Excel tips and tutorials at our blog. Sharpen your Excel skills and learn how to get your work done faster!

www.excel-university.com

but don't know how to write the formula to find duplicates

edit: in second thought this highlight all the duplicates and i need to keep one
like in:
data tab - Remove duplicate values

 

[excelNewbie22]

lol... found it
in my last respond
data tab - Remove duplicate values
didn't know you can choose multiple columns

feedback to me ?