Алгебра!!! -13 20 15 12 --- *---= --- : --- 16 39 21 35

Question

Алгебра!!!
-13 20 15 12
--- *---= --- : ---
16 39 21 35

Answer 1

-13/16 * 20/39 = - 5/12;
15/21 : 12/35 = 15/21 * 35/12 = 25/12 = 2 1/12

Answer 2

-13 20 5 15 35 5 + 5
-----* ---- =--- ------ * ---- =------ =
16 39 7 21 12 3 + 4

10 3
---- = 1 ---
7 7