Question

The operation {{x}} indicates that one should subtract 2 from x and then multiply the result by 2. The operation [[x]] indicates that one should multiply x by 2 and then subtract 2 from the product.
[[x]] - {{x}} =
Which one is the answer and why?
A) -2 B) 0 C) 2 D) 4 or E) It cannot be determined from the information given.

Answer 1

(2x - 2) - 2(x - 2)
= 2x - 2 - 2x + 4
=2.

Answer 2

Oh ok thank you