2х-3/5+3х/10-1-2х/3=2х-1

2х - 3/5 + 3х/10 - 1 - 2х/3 = 2х - 1;2х - 2х + 3х/10 - 2х/3 = - 1 + 3/5 + 1;3х/10 - 2х/3 = 3/5;9х/30 - 20х/30 = 3/5;- 11х/30 = 3/5;- х = 3/5 : 11/30;- х = 3/5 * 30/11;- х = 3/1 * 6/11;- х = 18/11;- х * (-1) = 18/11 * (-1);х = - 18/11;2 * (-18/11) - 3/5 + 3 (-18/11) / 10 - 1 - 2 * (-18/11) / 3 = 2 * (-18/11) - 1;- 36/11 - 3/5 - 54/11/10 - 1 + 36/11/3 = - 36/11 - 1;- 36/11 - 3/5 - 54/110 - 1 + 36/33 = - 36/11 - 11/11;- 36/11 - 3/5 - 27/55 - 1 + 12/11 = - 47/11;- 180/55 - 33/55 - 27/55 - 55/55 + 60/55 = - 47/11;- 235/55 = - 47/11;- 47/11 = - 47/11.