Question

16,6 -( x+2,07)=3,05

Answer 1

$16.6 - (x + 2.07) = 3.05 \\ 16.6 - x - 2.07 = 3.05 \\ 16.6 - 2.07 -3.05 = x \\ x = 11.48$

Answer 2

16,6 - (х + 2,07) = 3,05

(х + 2,07) = 16,6 - 3,05

х + 2,07 = 13,55

х = 13,55 - 2,07

х = 11,48

- - - - - - - - - - - - - - - - - -

Проверка:

16,6 - (11,48 + 2,07) = 3,05

16,6 - 13,55 = 3,05

3,05 = 3,05 - верно