Three particles A, B, and C form an equilateral triangle with a side length of 140 centimeters. A lies at the origin with a mass of 1.1 kilograms. B lies on the x axis with a mass of 2.5 kilograms. C lies in Quadrant I with a mass of 3.4 kilograms. To the nearest centimeter, what is the x coordinate of the center of mass of this system?