Question

[Nguyễn Thị Cẩm Nhung]

tìm x

x - 128 =(\(4\frac{20}{21}\)\(-\)5) \(\div\)(\(\frac{4141}{4141}\)- 1) \(\div\)(\(\frac{636363}{646464}\)- 1)

Answer 1

[An Nguyễn Trần Thành]

<=>        x - 128 = -25/21 :  (-1/64)

<=>      x - 128 = 1600/21

<=>      x = 128 + 1600/21 

=>        x = 4288/21

Answer 2

[do thanh nhan]

x=128