Question

-2,8(0,5х-3)=-7(х-1)
-3,6(2х+5)=6(5х-1)
Помогите пожалуйста!!!
35б!!

Answer 1

Ответ:

1) -2,8(0,5х-3) = -7(х-1)

  -1.4x+8.4 = -7x+7

  -1.4x+7x = 7-8.4

   5.6x = -1.4

   x = -0.25

2)  -3,6(2х+5) = 6(5х-1)

    -7.2x-18 = 30x-6

    -7.2x-30x = -6+18

    -37.2x = 12

     x = - 10/31

Answer 2

1) - 2,8(0,5x - 3) = - 7(x - 1)

- 1,4x + 8,4 = - 7x + 7

- 1,4x + 7x = 7 - 8,4

5,6x = - 1,4

x = - 0,25

2) - 3,6(2x + 5) = 6(5x - 1)

- 7,2x - 18 = 30x - 6

- 7,2x - 30x = - 6 + 18

- 37,2x = 12

x = - 10/31