Ответ:

Пошаговое объяснение:

А)

(1. 5/18 - 2. 4/27) * (-5,4|х|) = 9. 1/2 + 2. 1/4

(1. 15/54 - 2. 8/54) * (-5,4|х|) = 9. 2/4 + 2. 1/4

(1. 15/54 - 1. 62/54) * (-5,4|х|) = 11. 3/4

-47/54 * (-5,4|х|) = 11. 3/4

-47/54 * (-54/10|х|) = 11. 3/4

47/10|х| = 47/4

|х| = 47/4 : 47/10

|х| = 47/4 * 10/47

|х| = 10/4

|х| = 2,5

х1 = 2,5

х2 = -2,5

(-1. 3/4 +1. 5/12) * |х| = 1. 2/3 - 3. 5/7

(-1. 9/12 + 1. 5/12) * |х| = 1. 14/21 - 3. 15/21

-4/12 * |х| = -2. 1/21

|х| = -2. 1/21 : (-4/12)

|х| = -43/21 : (-1/3)

|х| = -43/21 * (-3/1)

|х| = -43/7 * (-1/1)

|х| = 43/7

|х| = 6. 1/7

х1 = 6. 1/7

х2 = -6. 1/7