Two different printing companies will print t-shirts if the design is submitted by the customer. master printing company charges a $40 set up fee plus $9 per shirt. five star printing company charges a $70 set up fee plus $6 per shirt. ? write an equation for each company that shows the total cost, c, for any number of t-shirts, t. how many shirts must be printed for the cost to be the same at each company? show all work. ? enter your equations, work and answer in the box below.