deletions | additions       diff --git a/Question 3.md b/Question 3.md  index 09c289d..98a4d25 100644  --- a/Question 3.md  +++ b/Question 3.md 
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\X_{i}\ \(X_{i}\)  is arc-consistent with respect to another variable \X_{j}\ \(X_{j}\)  if for every value in the current domain \D_{i}\ \(D_{i}\)  there is some value in the domain \D_{j}\ \(D_{j}\)  that satisfies the binary constraint on the arc (\X_{i}\,\X_{j}\) (\(X_{i}, X_{j}\))