Решить уравнение 1) 3*(4x-8)=3x-6; 2) -4*(-z+7)=z+17

Question

Решить уравнение 1) 3*(4x-8)=3x-6; 2) -4*(-z+7)=z+17

Answer 1

12х-24=3х-6                           4z-28=z+17

12х-3х=-6+24                            4z-z=17+28

9х=18                                         3z=45

х=2                                               z=15

Answer 2

1) 3*(4x-8)=3x-6

    12х-24=3х-6

    12х-3х=24-6

          9х=18

           х=18:9

           х=2

          

2) -4*(-z+7)=z+17

      4z-28=z+17

      4z-z=28+17

          3z=45

           z=45:3

           z=15