а) (4 - 3,5 * (2 1/7 - 1 1/5) / 0,16 3 2/7 - 3/14 / 1/6
--------------------------------------- = -------------------------
x 41 23/84 - 40 49/60
1) 2 1/7 - 1 1/5 = 15/7 - 6/5 = 75/35 - 42/35 = 33/35
2) 3,5 * 33/35 = 3 5/10 * 33/35 = 35/10 * 33/35 = 3,3
3) 4 - 3,3 = 0,7
4) 0,7 / 0,16 = 4,375
5) 3/14 / 1/6 = 3/14 * 6/1 =18/16
6) 3 2/7 - 18/14 = 23/7 - 18/14 = 46/14 - 18/14 = 28/14 = 2
7) 41 23/84 - 40 49/60 = 3467/84 - 2449/60 = 208020/5040 - 205716/5040 = 16/35
Итого:
4,375 2
--------- = ----------
x 16/35
x = (4,375 * 16/35) / 2 = 1
Ответ: x = 1.