Question

Let a,b,c ∈ Z. Define the highest common factor hcf(a,b,c) to be the largest positive integer that divides a,b and c. Prove that there are integers s,t,u such that hcf(a,b,c) = sa+tb+uc. Find such integers s,t,u when a = 91, b = 903, c = 1792

Answer 1

21 they have too be right next to each other and threy have too be right