A man wants to get his work building, but he almost forgot his code. He only remembers five clues. These…

A man wants to get his work building, but he almost forgot his code. He only remembers five clues. These are:
The fifth number plus the third number equals to 14
The fourth number is one more than the second number
The first number is one less than twice the second number
Second number plus the third number equals to 10
The sum of all five numbers is 30