The sum of a number and the original number increased by 5 is at least 12, what could be the original number?

MY WORK:

x + x + 5 > or = to 12

2x + 5 > or = to 12

2x > or = to 12 - 7

2x > or = to 7

x > or = to 7/2

But the answer is 4. How can this be?