The linear congruence in two variables ax + by ≡ c (mod m), where a, b, c, and m are integers, m > 0 with d = (a, b, m), has exactly dm incongruent solutions if d|c, and no solutions otherwise. Find all solutions of the following linear congruences in two variables: (i) 2x + 3y ≡ 1 (mod 7) (ii) 10x + 5y ≡ 9 (mod 15)

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter2: The Integers
Section2.5: Congruence Of Integers
Problem 51E: In the congruences ax b (mod n) in Exercises 40-53, a and n may not be relatively prime. Use the...
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The linear congruence in two variables ax + by ≡ c (mod m), where a, b, c, and m are integers, m > 0
with d = (a, b, m), has exactly dm incongruent solutions if d|c, and no solutions otherwise. Find all solutions of the
following linear congruences in two variables:
(i) 2x + 3y ≡ 1 (mod 7)
(ii) 10x + 5y ≡ 9 (mod 15).

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