Question

3/4 + (10 27/40 + a) = 15 3/4
Помогите решить уравнение, пожалуйста

Answer 1

40 3/4 - (10 27/40 + х) = 15 3/40,

40 3/4 - 10 27/40 - х = 15 3/40,

х = 40 30/40 - 10 27/40 - 15 3/40,

х = 15