Question #5b0f3

1 Answer
Nov 14, 2016

See explanation below

Explanation:

a-=b [mod n]
a and b are congruent modulo n
(a-b) is a multiple of n (n divides (a-b))

3x-=1 [mod 26]
3x and 1 are congruent modulo 26
(3x-1) is a multiple of 26

3x-1=26k
where
k is an integer

3x=26k+1