Two machines at a factory are filling cans of soup. One machine has already filled 180 cans of soup, and fill cans at a rate of 15 per minute. The second machine has already filled 210 cans of soup, and filled cans at a rate of 12 per minute. Write an equation to show when the two machines will have filled the same number of cans of soup. use X as your variable

180 + 15x = 210 + 12x