how to translate word sentence into algebra expressions

The example describes how to translate the following word statement into algebra expressions. Statement 1 is that three more than four times the number x.
Statement 2 is that five less than twice the number x. Statement 3 is if the sum of two numbers is 20, in which one number is x, then the product of x and another number is.
Statement 4 is that the difference of one-third of x and half y. Statement 5 is that five less than the reciprocal of x. Statement 6 is that x and y are two numbers, express y in terms of x
in the following case: Case 1: y is two-third of the number x. Case 2: y is five more than half of x. Case 3: the reciprocal of x is 8 less than y.