[ x- 2017 ] + [ x - 2018 ] = 2019
x - 2017 + x - 2018 = 2019
2x - ( 2017+2018) = 2019
2x - 4035 = 2019
2x = 4035 + 2019 = 6054
x = 3027
[x-2017]+[x-2018]=2019
x-2017+x-2018=2019
(x+x)-(2017+2018)=2019
2x-4035=2019
2x=2019+4025
2x= 6044
x=6444:2
x=3222