Помогите пожалуйста! не

5х + 3(х - 1) = 6х + 11                    3х - 5(2 - х) = 54

5х +3х - 3 = 6х + 11                        3х - 10 + 5х = 54

5х +3х - 6х = 11 + 3                        8х = 54 + 10

2х = 14                                            8х = 64

х = 14 : 2                                         х = 64 : 8

х = 7                                                х = 8

8(у - 7) - 3(2у + 9) = 15                   0,6 - 0,5(у - 1) = у + 0,5

8у - 56 - 6у - 27 = 15                       0,6 - 0,5у + 0,5 = у + 0,5

8у - 6у = 15 + 56 + 27                     - 0,5у - у = 0,5 - 0,6 - 0,5

2у = 98                                            - 1,5у = - 0,6 

у = 98 : 2                                          у = - 0,6 : (- 1,5)

у = 49                                               у = 0,4