Question

(3,8-x) 11 = 5,5 (3,6-x)

Answer 1

(3,8-x)*11 = 5,5*(3,6-x)
41,8-11x = 19,8-5,5x
-11x+5,5x=19,8-41,8
-5,5x=-22
x=22:5,5
x=4

Answer 2

Вообще то -4

Answer 3

Ой,да ответ 4