50 - 3n = 7n + 80i need on the steps on doing this problem? ?

Which equation represents a proportional relationship that has a constant of proportionality equal to 1/5

anyone? find the second, fifth, and ninth terms of a sequence where the first term is 65 and the common difference is -7. 72, 93, 121 72, 79, 86 58, 37, 9 58, 51, 44

What kinds of numbers make up the set of numbers called the real numbers? give examples when you explain a number type. there are a limited set of types of numbers, but an unlimited number of examples of these numbers.