If n – k = m, what is the value of m? (1) k – 2 = m + k (2) k = n

Question

If n – k = m, what is the value of m?
 
(1) k – 2 = m + k 
(2) k = n + 2

Leo8 · Answer

D

= k - 2 = m + k ==> m = -2
  = k = n + 2 ==> n - k ==> -2 = m

Mo2men · Answer

If n – k = m, what is the value of m? 
 
 (1) k – 2 = m + k

Cancel out k from both sides
m =-2
Sufficient 
 
 (2) k = n + 2

From question stem: n = k + m

k = k +m +2

Cancel out k from both sides
m =-2
Sufficient

Answer: D

Skywalker18 · Answer

(1) k – 2 = m + k 
=> m= -2
Sufficient

(2) k = n + 2
n- n-2 = m
=> m = -2
Sufficient

Answer D

akshayk · Answer

1) m =-2
Sufficient.

2) n - n - 2 = m
=> m = -2.
Sufficient.

D is the answer.

BrentGMATPrepNow · Answer

Target question :    What is the value of m?

Given :  n – k = m

Statement 1 : k – 2 = m + k  
Subtract k from both sides to get:  -2 = m 
DONE! 
Since we can answer the  target question  with certainty, statement 1 is SUFFICIENT

Statement 2 : k = n + 2  
Subtract 2 from both sides to get: k - 2 = n
Subtract k from both sides to get: -2 = n - k
Since it's given that  n – k = m , we can take the equation -2 = n - k and REPLACE  n - k  with  m 
When we do this, we get:  -2 = m 
DONE! 
Since we can answer the  target question  with certainty, statement 2 is SUFFICIENT

Answer:  D

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If n – k = m, what is the value of m? (1) k – 2 = m + k (2) k = n