100(X - 2) + 10X + 2X = 100*2X + 10X + X - 2 - 495
100X-200+10X+2X=200X+10X+ X - 2 - 495
100X+10X+2X-200X-10X-X=- 2 - 495+200
-77X=-297
X=77/297