x + (x + 1) + (x + 2) = 84
3x + 3 = 84
x = 27
27 + 28 + 29 = 84
x + (x + 1) + (x + 2) + (x + 3) + (x + 4) + (x + 5) + (x + 6)= 84
7x + 21 = 84
x = 9
9 + 10 + 11 + 12 + 13 + 14 + 15 = 84
8x + 28 = 84
x = 7
7 + 8 + 9 + 10 + 11 + 12 + 13 + 14 = 84
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Three consecutive numbers whose sum is 84 are 27, 28 and 29 AND 26, 28 and 30.
The numbers are -30, -28 and -26.
The numbers are 82, 84, 86 and 88.
26 28 30
84 + 86 + 88 = 258