The sum of a number and the two numbers preceding it is equal to 30. Find the number.

1) 10
2) 11
3) 9
4) 8

• 11
  if x is desired number, then
  x+x-1+x-2=30
  3x-3=30
  x=11
• 12 years agoHelpfull: Yes(1) No(0)
• x-2+x-1+x=30
  3x-3=30
  x=11
• 5 years agoHelpfull: Yes(1) No(0)
• 11
  X-2+X-1+X=30
  X=11
• 9 years agoHelpfull: Yes(0) No(0)
• 9
  9+1=10 ( Preceding )
  10+1=11 ( Preceding )
  // 9+10+11=30
• 7 years agoHelpfull: Yes(0) No(0)