Question

Tìm x:

x - 2 (x - 1/2) = -3^2

Answer 1

`x-2(x-1/2)=-3^2`

`x-2x+1=-9`

`-x=-10`

`x=10`

Answer 2

`x-2.(x-1/2)=-3^2`

`x-2.(x-1/2)=-9`

`x-2x +1=-9`

`-x+1=-9`

`-x=-9-1`

`-x=-10`

`=>x=10`

Vậy `x=10`