Question

(8-z)×7=28
Помогите пж​

Answer 1

Ответ:

(8-z)×7=28

-7z+56=28

-7z=28-56

-7z=. -28

z=4

Answer 2

Ответ:

$(8 - z) \times 7 = 28 \\ 56 - 7z = 28 \\ - 7z = 28 - 56 \\ - 7z = - 28 \\ z = \frac{ - 28}{ - 7} = 4$