If a string of red holiday lights blinks once every 3 seconds while a string of blue lights blink once every 4 seconds. how many times both sets of lights blink at the same time in 1 minutes?

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.