The difference between six times a number and 7 is equal to five times the sum of the number and 4. Find the number. If x represents the number, which equation is correct for solving this problem?

A. 7-6x=5x+4
B. 6x-7=5(x+4)
C. 7-6x=5(x+4)
D. 6x-7=5x+4

Derek purchased a new gym membership. it costs him seven dollars a month plus two dollars for every time that he visits the gym. he wants to spend less than 25 dollars a month to visit the gym. write an inequality that models the situation using the variable v for the number of visits per month. also find the maximum number of visits he can make to the gym and still keep his cost below 25 dollars a month.