Найдем сумму решений уравнения | 2 * x + 6 | - | x - 4 | = 8.| 2 * x + 6 | - | x - 4 | = 8 ;| 2 * x + 6 | = 8 + | x - 4 |; 1 ) 2 * x + 6 = 8 + | x - 4 |; 2 * x + 6 - 8 = | x - 4 | ; 2 * x - 2 = | x - 4 | ; a ) x - 4 = 2 * x - 2 ; x - 2 * x = - 2 + 4 ; - x = 2 ; x = - 2 ; б ) - ( x - 4 ) = 2 * x - 2 ; x - 4 = - 2 * x + 2 ; x + 2 * x = 2 + 4 ; 3 * x = 6 ; x = 2 ; 2 ) - ( 2 * x + 6 ) = 8 + | x - 4 | ; - 2 * x - 6 = 8 + | x - 4 | ; - 2 * x - 6 - 8 = | x - 4 | ; - 2 * x - 14 = | x - 4 | ; a ) x - 4 = - 2 * x - 14 ; x + 2 * x = - 14 + 4 ; 3 * x = - 10 ; x = - 10 / 3 ; б ) - ( x - 4 ) = - 2 * x - 14 ; x - 4 = 2 * x + 14 ; x - 2* x = 14 + 4 ; - x = 18 ; x = - 18 ; Сумма решений равна : - 2 + 2 + ( - 10 / 3 ) + ( - 18 ) = - 10 / 3 - 18 = - 10/ 3 - 54 / 3 = - 64 / 3 ; Ответ: - 64 / 3.