X x (2+3+1) - 2389 = 3779
X x 6=3779+2389
X x 6= 6168
X=6168:6
X = 1028
X x 3 + X x 2 +X -2389=3779
Xx(3+2-2389)=3779
Xx(-2389)=3779
x=3779:(-2389)
x=-3779/2389
Vậy x=-3779/2389
X x 3 + X x 2 +X -2389=3779
Xx3+Xx2+Xx1 =3779+2389
Xx3+Xx2+Xx1 =6168
Xx(3+2+1 ) =6168
Xx6 =6168
x=6168:6
x=1028
X x 3 + X x 2 + X - 2389 = 3779
X x ( 3 + 2 + 1 ) - 2389 = 3779
X x 6 = 3779 + 2389
X x 6 = 6168
X = 6168 : 6 = 1028