Question 879739
Let n be the number you need to find.

2(n-6) = n + 5

We now solve for n.

2n - 12 = n + 5

2n - n = 5 + 12

n = 17

The answer is 17.

By the way, you could use any letter to represent the number you are looking for. It does not have to n or x or y. Understand?