a. 15 - x = 7 - (-2),,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, ;15 - x = 9,,,,,,,,,,,,,,,,,,,,,, ; x=15-9,,,,,,,,,,,,,,,,,; x=6,,,,,,,,,,,,,,,,,,,,,, b. x - 35 = ( -12 ) - 3,,,,,,,,,,,,, ; x - 35 = -15,,,,,,,,,,,,,,; x = -15 + -35,,,,,,,,,,; x = -50,,,,,,,,,,,; c. | x + 2| = 0 => x = -2,,,,,,,,,,,,,,; d. | x - 5 |= 7 => x = 7 + 5 hoặc x = -7 + 5,,,,,,,,,,,,,,; x = 12 hoặc x = -2,,,,,,,,,,,,,,,,,,; e. 25 - ( 30 + x ) = 15 - ( -11 ),,,,,,,,,,,,,,; 30 + x = 25 - 26 =-1,,,,,; x = -1 - 30 = -31,,,,,,,,,,,,; f. ( x - 12 ) - 15 = 20 - 7 - ( - | -12 | ),,,,; x - 12 = 40,,,,,,; x = 52...............( Bạn hãy nhìn theo chiều ngang vì máy của mình không viết xuống dòng được ),,,,,,,,,,,, nếu có chỗ nào thắc mắc cứ hỏi mình.
