how do i even do this

Question

The freshman and sophomore classes at Kensington High School are decorating floats for homecoming. The freshmen have already spent $439 on their float, plus they need to buy floral sheeting that costs $68 per roll. The sophomores, who have spent $313 so far on theirs, still need to purchase vinyl grass at $86 per roll. Both classes plan to buy the same number of rolls, since they have the same area to cover. By coincidence, the two floats will have the same total cost in the end. How many rolls will each class be buying? How much will each class spend in total?

Answer 1

439 + 68x = 313 + 86x

 

Can you solve for x and answer?