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  • 13-09-2016
  • Mathematics
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The sum of three consecutive odd integers is 21. x+(x+2)+(x+4)=21 x+(x+1)+(x+2)=21 x+(x+1)+(x+3)=21 x+(x+3)+(x+5)=21

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  • 14-09-2016
x+(x+2)+(x+4)=21
x+x+x+2+4=21
3x+6=21
(3x+6)/3=21/3
x+2=7
x=7-2
x=5

Answer 5, 7, 9
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