You can put this solution on YOUR website! x is an odd number
x+2 is the next odd number
x+2+2 = x+4 is the next odd number
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x +x+2 +x+4 = 57
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3x +6 = 57
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3x = 51
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x = 17
x +2 = 19
x +4 = 21
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17 +19 +21 = 57
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Answer: The three consecutive odd numbers are 17, 19 and 21.
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Done.