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Let the 3 consecutive numbers be (a-1), a, and (a+1)
So, (a-1) + (a) + (a+1) = 216
You add the left-hand side and get:
3a =216
You divide and get:
a = 216/3 = 72
So,
(a-1) = 72-1 = 71
a = 72
(a+1)= 72+1 = 73
Check: 71+72+73 = 216
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