Question

21 – 20(x+1)=8
Bằng nhiêu vậy ạ?

Answer 1

=>20(x+1)=13

=>x+1=13/20

hay x=-7/20

Answer 2

20(x+1) = 21- 8

20(x+1) =13

x + 1 = 13 : 20

x + 1 = 13/20

x = 13/20 -1

x = -7/20

Answer 3

`20(x+1)=13`

`x+1=13/20`

`x=-7/20`