The solution set is x = 5n + 3 where n is any integer.
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Add 5 in mod 8. (You can always subtract 3 in mod 8 as well, eg 5 + 3 = 0; 0 - 3 = 5.)
If: 6x-4+7 = 5 Then: x = 1/3
14x = 5 x = 5/14
6
(2, 3) is a solution only if it satisfies the equation. x + 5y = 4 (2) + 5(3) =? 4 2 + 15 =? 4 17 = 4 False Therefore, (2, 3) is not a solution to the given equation.