Question

Ayudenme con estos ejercicios

Answer 1

1)  3x + 1 =  2 x/ 5 - 2

       3x - 2 x / 5 =  - 2 - 1

       3x - 2 x / 5 =  - 3

     (15x - 2x) / 5 = - 3

                        13x = 5(-3)

                        13x = -15

                             x = - 15 / 13

2) 10 (1 + 4x) = 14 + 24x

           10 + 40x = 14 + 24x

          40 x - 24x =  14 - 10

                      16x = 4

                            x = 4 / 16

                            x = 1 / 4

 

3) 4 (2a + 5)  - 70 = - 2a

        8a  +  20  - 70 =  - 2a

                   8a  - 50 =  - 2a

                    8a + 2a =  50

                               10a = 50

                                    a = 50 / 10

                                    a = 5

 

4)        4 (x + 5) = (3 - 2x) / 2

      2 (4) (x + 5) =  3 - 2x

             8 (x + 5) =  3 - 2x

                8x + 40 = 3 - 2x

                8x  + 2x = 3 - 40

                         10x =  - 37

                               x = - 37 / 10

5) (8 - 3n) / 8 =  (6 - 5n) / 6

     6 (8 - 3n) = 8 (6 - 5n)

Simplificando los factores 6 y 8:

     3 (8 - 3n) = 4 (6 - 5n)

        24 - 9n = 24 - 20n

   - 9n + 20n = 24 - 24

                 11n = 0

                       n = 0 / 11

                       n = 0