Answer:
11 + x
Step-by-step explanation:
Let's write out each of the answer choices:
A) 11x
B) 11 + x
C) 11 minus x ⇒ 11 - x
D) Negative x + 11 ⇒ -x + 11
Examine each of them. Clearly, A and D aren't the same (A is multiplication, not addition, and D has a negative x instead of a positive x). C is actually the same as D, if you switch the places of 11 and -x: 11 - x = -x = 11.
Finally, answer choice B is correct because by the Commutative Property of Addition, 11 + x = x + 11.
Hope this helps!
