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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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15y ago

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