Which of these would be a helpful first step in solving the equation? Check all that apply. 9x + 5 = 5x + 21

A. subtract 5x
B. divide by 3
C. subtract 16
D. divide by 9
E. subtract 5​

Iam so stuck. what is the worked out answer for this question?

Suppose that an airline uses a seat width of 16.516.5 in. assume men have hip breadths that are normally distributed with a mean of 14.414.4 in. and a standard deviation of 0.90.9 in. complete parts (a) through (c) below. (a) find the probability that if an individual man is randomly selected, his hip breadth will be greater than 16.516.5 in. the probability is nothing. (round to four decimal places as needed.)

What is the solution set of the quadratic inequality x^2-5< or equal to 0