Question

3× ( 0,4x +1,4) = x - 0,8​

Answer 1

Ответ:

3× ( 0,4x +1,4) = x - 0,8​

1,2х+4,2=х-0,8

0,2х=-5

х=-5 : 0,2

х=-25

Answer 2

$3(0.4x + 1.4) = x - 0.8 \ 1.2x + 4.2 = x - 0.8 \ 0.2x = - 5 \ x = - 25$

Answer 3

а почему -5

Answer 4

-0.8-4.2=-5

Answer 5

спасибо!