Bài 2. Tìm số nguyên x biết: a) -120 + ( x - 15) = - 1 b) 101 – ( - 73 - x) = (-2) 3 c) 231 – (x - 16) = 1339 : 13 d) -170 – 5. x = 30 e) (- 11) 2 – 3. (x - 4) = 76 f) 15 - | x | = - 3 g) | x - 2| +5 = 17 h) | x + 3| - 5(- 7 +13) = 24 i) | x - 2019| = | x - 2020| j) (x - 1) 2 = 9