-3X+1-3(x+3)=-2(1-x)+2
- 3х + 1 - 3(х + 3) = - 2(1 - х) + 2 - 3х + 1 - 3х - 9 = - 2 + 2х + 2 - 3х - 3х - 2х = - 2 + 2 - 1 + 9 - 8х = 8 х = 8 : (- 8) х = - 1 Проверка: - 3 * (- 1) + 1 - 3(-1 + 3) = - 2(1 + 1) + 2 3 + 1 - 6 = - 4 + 2 - 2 = - 2