Question

111,11:(21,45-1,94х)-3,2=51

Answer 1

111,11:(21,45-1,94х)-3,2 = 51

111,11:(21,45-1,94х) = 51+3,2

111,11:(21,45-1,94х) = 54,2

21,45-1,94х = 111,11:54,2

21,45-1,94х = 2,05

1,94х = 21,45-2,05

1,94х = 19,4

х = 19,4:1,94

х = 10

Проверка:

111,11:(21,45-1,94*10)-3,2  = 111,11:(21,45-19,4)-3,2 = 111,11:2,05-3,2 = 54,2-3,2 = 51

Ответ: 10.