The sum three times a number and 2 less than 4 times that same number is 15. which of the following equations could be used to find the value of the number, n? explain how you arrived at your choice

Sam is a waiter at a local restaurant where he earns wages of $5 per hour sam figures that he also eams about $3 in tips for each person he serves sam works 6 hours on a particular day. if n represents the number of people sam serves that day, which of the following functions could sam use to figure ehis total earings for the do o a. en) = 30 o b. en) = 5n+ 18