Question

[Trịnh Thúy An]

XX + X x 89 +X : X = 401 

Answer 1

[Trần Gia Đạo]

X + X x 89 +X : X = 401 

X x (1 + 89) + 1 = 401

X x 90 = 401 - 1

X = 400 : 90

X = 40/9