Question

Tìm x biết:

120 -  (3x -9) = 1440: 12

Answer 1

x = 3

Answer 2

x = 3

Answer 3

\(120-\left(3x-9\right)=1440:12\\ \Rightarrow120-\left(3x-9\right)=120\\ \Rightarrow3x-9=120-120\\ \Rightarrow3x-9=0\\ \Rightarrow3x=0+9\\ \Rightarrow3x=9\\ \Rightarrow x=9:3\\ \Rightarrow x=3\)

Answer 4

120-(3x-9)=120

-3x+9=120-120

-3x+9=0

-3x=-9

x=-9:(-3)

x=3

Answer 5

`120 - (3x - 9) = 1440 : 12`

`=>` `120 - (3x - 9) = 120`

`=>` `3x - 9 = 0`

`=>` `3x = 9`

`=>` `x = 9 : 3`

`=>` `x = 3`

Vậy `x = 3`

Answer 6

x = 3