In the following equations, what would you multiply the second equation to eliminate the "x"? *(Giving Brainliest)

3x + y = 20
x + y = 12

1) -1

2) 1

3) -3

4) 3

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.