Write an equation from the given statement and solve.
1). The sum of six times a number and 9 is 31.
2). The quotient of a number and 5 decreased by 14 is 23.
3). 32 more than the product of 8 and a number equals 72.
4). 18 less than a number times 6 is 36.
5). A number divided by 3 and added to 15 is 40.