Translate each verbal phrase into an algebraic expression or equation.
13) Seven more than the quotient of a number and 2 is 10.
14) Five less than twice a number is 7.
15) One less than the product of four and a number is 11.
16) Six less than six times a number is 12.
17) Ten more than the quotient of a number and 3 is 12.
18) Seven more than twice a number is 1.
19) The sum of 9 and the quotient of x and 7 is 11.
20) The product of 8 and the difference of n and 3.