Question

[Đỗ Hà Phương]

Tìm x:
(x : 12) x 9 + 8 = 80

Answer 1

[Ngô Hải Nam]

`(x:12)xx9+8=80`

`(x:12)xx9=80-8`

`(x:12)xx9=72`

`x:12=72:9`

`x:12=8`

`x=8xx12`

`x=96`

Answer 2

[Anh Thư Bùi]

\(\left(x:12\right)\times9+8=80\)

\(\Rightarrow\left(x:12\right)\times9=80-8\)

\(\Rightarrow\left(x:12\right)\times9=72\)

\(\Rightarrow x:12=72:9\)

\(\Rightarrow x:12=8\)

\(\Rightarrow x=12\times8\)

\(\Rightarrow x=96\)

Vậy x=96