Ta gọi số cần tìm là:   abc9

Vậy, ta có: abc9 - abc = 126

c = 9 - 6 = 3

ab39 - ab3 = 126

b = 3 - 2 = 1

a139 - a13  = 126

a = 1 - 1 = 0

0139 - 013 = 126

Vậy số cần tìm là 139

woula rather ko có to

1.The staff are working on weekends so as not to delay the project any further

You are supposed to obey him.