i'm having difficulty working out this question

 

find all possible values of d

 

when a certain positive integer N is divided by a positive integer d, the remainder is 7.

if 2N + 3 is divided by d the remainder is 1

 

any help to get me started.........

Have you learnt the symbol of mod?

Set two equations connecting N and d.

I give you an example.

If F is divided by f, the remainder is 1.

F=1+ft(t:integer)

Now, I think you know how to solve it.