7 ate 9
7 (8) 9
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The two possible answer are (-7, -6) and (6, 7).
7/x^6 = 7x^-6
-1
Guessing that is: 9 2/7 - 6 5/7 = (8 + 1 + 2/7) - 6 5/7 = (8 + 7/7 + 2/7) - 6 5/7 = 8 9/7 - 6 5/7 = 2 4/7 Alternatively, using improper fractions: 9 2/7 - 6 5/7 = (9x7+2)/7 - (6x7+5)/7 = 65/7 - 47/7 = 18/7 = (2x7+4)/7 = 2 4/7
5+6+7 , 5+7+6 , 6+5+7, 6+7+5 , 7+5+6, and 7+6+5