Question

Помогите с номером 981 под буквой б)

Answer 1

7 * 2/3 + 7 * 1/2 + 7 * 5/6 = 7 * (2/3 + 1/2 + 5/6) = 7 * (4/6 + 3/6 + 5/6) = 7 * (4+3+5)/6 = 7 * 12/6 = 7 * 2 = 14