Step by step solution for 987

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Solution

-	9	8	7
-	3	4	5
	6	4	2

Step 1

-	9	8	7
-	3	4	5
			2

Step 2

-	9	8	7
-	3	4	5
		4	2

Step 3

-	9	8	7
-	3	4	5
	6	4	2