Ответ:

Пошаговое объяснение:

1/4(2а - 4) - 1/3(5b + 6) =

2/4a - 4/4 - 5/3b - 6/3 =

1/2a - 1 - 1. 2/3b - 2

1/2a - 1. 2/3b - 3

1/2*2. 1/2 - 1. 2/3*3/15 - 3 = 1/2 * 5/2 - 5/3*3/15 - 3 =

5/4 - 15/45 - 3 =

1. 1/4 - 1/3 - 3 =

1. 3/12 - 4/12 - 3 =

15/12 - 4/12 - 3 =

11/12 - 3 = -2. 1/12