Question

on dividing a positive integer n by a 9 we get 7 as remainder what will be the
remainder if 3n -1 is divided by 9​

Answer 1

Step-by-step explanation:

the no. can.be written as 9k+7

3n-1=3(9k+7)-1=27k+20=9(3k+2)+2.

hens reminder will be 2