Mathematics
Senior High

この問題がわかりません。答えは(-6,5)(0,-1)(14,-7)(20,-13)なのですが、解き方を教えて頂きたいです🙇‍♀️

2x2+7xy +6y?-y-7=0のを満たす整数の組(x,y)をすべて求めよ. (ただし,23 5 < 8| 9 < 12 13 とする) (x, y) = 2 5 89 12 | 13 " 6|7 ラ ラ 10 | 11 " 14 | 15 | 16

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