Write an equation for each sentence and then solve the equation using x as the variable.
(Please answer this properly and, if possible, ASAP. Thank you)

1. 2 less than a number is 21. Find the number.\
2. 3 times a number is 15 more than twice the same number. Find the number
3. If 5 times a number is subtracted from six times the same number, the result is -21. find the number.
4. Hanna's brother is now 3 times as old as she. in 5 years, his age will be twice hers. Find Hanna's age now.
5. Loui's mother is twice as old as he. 10 years ago, her age was thrice his age. Find Loui's age now.