Tìm x biết: (2018x - 2017)^2018 = (2018x - 2017)^2017

tìm x biết
a. (2018x-2017)^2018=(2018x - 2017)^2017
b. 2x - 6/8 - 6/56 - 6/140 - 6/260 = 43/52
c. x/2004 + x/1002 +667x/668 - 2004 = 0