25-3.(x-8)=106
3.(x-8)=25-106
3.(x-8)=-81
x-8=-81:3
x-8=-27
x=-27+8
x=-19
25 - 3 . ( x - 8 ) = 106
3 . ( x - 8 ) = 25 - 106 = -81
x - 8 = ( -81 ) : 3 = -27
x = ( -27 ) + 8 = -19
Vậy x = -19
25 - 3 x ( x - 8 ) = 106
3 x ( x - 8 ) = 106 - 25
3 x ( x - 8 ) = 81
x - 8 = 81 : 3
x - 8 = 27
x = 27 + 8
x = 35