The number of positive pairs of integral values of (x, y) that solves
2xy − 4x2 +12x − 5y = 11 is
(A) 4;
(B) 1;
(C) 2;
(D) none of these.
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The number of positive pairs of integral values of (x, y) that solves 2xy − 4x2 +12x − 5y = 11 is
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