Correct: x/5 = 4/5 then x = 4, (x+1)/6  = 2/4 then x = 2, 4/5 = 4/x then x = 5, (x+2)/4 = 3/2 then x = 1, 3/7 = x/7 then x = 3, Incorrect: (x+1)/5 = 2/5 then x = 2, 4/6 = 2/x then x = 3, (x+2)/4 = 3/2 then x = 2, (x+2)/6 = 2/4 then x = 3, 2/6 = x/3 then x = 4,

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