Question

(17+n).3=(29+n).2

Answer 1

n=7 neu can loi giai thi nhan tin roi minh ghi tiep

Answer 2

(17+n).3=(29+n).2

17.3+n.3=29.2+n.2

51+n.3=58+n.2

n.3-n.2=58-51

n=7

Vậy n=7