Cramer's Rule breaks down when det(A) = 0. Example (i) has no solution while (ii) has infinitely many solutions. What are the ratios x; = det(B;)/det(A) in the following two cases? B; has columns of A except the j-th column replaced with the right hand side.
(i) Parallel lines
3x + 4y = 2
6x + 8y = 2
(ii) Same lines
3x + 4y = 2
6x + 8y = 4